Dog Bite Treatment: First Aid, Antibiotics & When to See a Doctor

Approximately 4.5 to 4.7 million dog bites occur in the United States every year, according to the CDC. Nearly 1 in 5 people bitten by a dog requires medical attention, and dog bites account for approximately 337,000 emergency department visits annually. Most bites are from a dog known to the victim. Knowing what to do in the first minutes after a bite — and when to seek care — can prevent infection, reduce scarring, and in rare cases, save a life.

• 1
  What is the first aid treatment for a dog bite? Wash the wound immediately with mild soap and warm, running water for at least 5 minutes. Apply an antibiotic ointment (such as Neosporin). Cover with a clean bandage. Seek medical care if the skin is broken. Starting wound care within 6 hours reduces infection risk from 59% down to approximately 8%, per NIH/StatPearls.

  The first priority after any dog bite that breaks the skin is thorough wound cleaning. Mayo Clinic recommends washing with soap and water, applying an antibiotic cream or ointment, and covering with a clean bandage. If there is any concern about rabies exposure, the CDC recommends using povidone-iodine solution (such as Betadine) diluted 10:1 with water to irrigate the wound, as it has been shown to be virucidal. NIH/StatPearls (April 2025) confirms that early antibiotic treatment within 6 hours of a dog bite reduces the infection risk to approximately 8%, compared to 59% if treatment is delayed. Do not close or cover a puncture wound tightly before a doctor has examined it. For minor wounds that only barely break the skin and are not on the hands, face, or a high-risk location, this basic first aid may be all that is required if the dog is known, vaccinated, and healthy.
• 2
  What antibiotic is used for dog bites in humans? Amoxicillin-clavulanate (Augmentin) is the first-line antibiotic for dog bites, recommended by the AAFP, AAP, NIH/StatPearls, and the Infectious Diseases Society of America. It covers the full range of bacteria found in a dog’s mouth, including Pasteurella canis, Staphylococcus aureus, and anaerobic bacteria. A 3–7 day course is standard for prophylaxis.

  The AAFP (American Academy of Family Physicians) states explicitly: “Amoxicillin-clavulanate potassium (Augmentin) is the antibiotic of choice for a dog bite.” This recommendation is also confirmed by NIH/StatPearls (2025), the American Academy of Pediatrics, Children’s Mercy Hospital guidelines, and UCSF’s Infectious Disease Management Program. Dog bite wounds are polymicrobial — the median culture yields 5 different bacteria — and amoxicillin-clavulanate’s broad coverage of both aerobic and anaerobic bacteria makes it uniquely well-suited for this purpose. For prophylaxis (preventing infection in a high-risk wound), a 3-day course is often sufficient. For an already-infected wound showing signs of cellulitis (redness, warmth, swelling, pus), a 5–7 day course is standard. For Frank cellulitis, the AAFP recommends a 10–14 day course.
• 3
  What is the best antibiotic for a dog bite if I’m allergic to penicillin? For penicillin-allergic adults: doxycycline (Vibramycin) alone, or clindamycin plus a fluoroquinolone (ciprofloxacin or levofloxacin), or clindamycin plus trimethoprim-sulfamethoxazole (Bactrim). For children allergic to penicillin: clindamycin plus TMP-SMX. Doxycycline is not given to children under 8 or pregnant women. Always confirm allergies with your doctor.

  The AAFP lists doxycycline (Vibramycin) as the primary alternative for penicillin-allergic adults, except for children younger than 8 years and pregnant women. The Children’s Mercy Hospital antibiotic guidelines confirm clindamycin combined with either doxycycline or trimethoprim-sulfamethoxazole (TMP-SMX, brand names Bactrim or Septra) as the standard alternative for penicillin-allergic patients. For hospitalized patients with severe infections, intravenous ampicillin-sulbactam (Unasyn) or piperacillin-tazobactam is typically used. NIH/StatPearls (2025) also notes that MRSA coverage with TMP-SMX, doxycycline, or clindamycin may be necessary if culture results suggest methicillin-resistant Staphylococcus aureus. Never self-prescribe antibiotics for a dog bite — the choice depends on your specific allergy history, wound severity, and other medical conditions.
• 4
  Do I need a tetanus shot for a dog bite? Yes, if it has been more than 5 years since your last tetanus booster and the wound is considered “dirty” or high-risk. If your tetanus history is unknown or incomplete (fewer than 3 doses), you also need tetanus immune globulin. Dog bites are classified as “dirty” wounds, lowering the safe interval from 10 years (clean wounds) to 5 years.

  The AAFP states: “Tetanus vaccination is recommended after an animal bite if it has been more than five years since the patient has been immunized.” The American Academy of Pediatrics confirms that tetanus toxoid should be given for high-risk bites without vaccination within 10 years, but a booster for dirty wounds is indicated at 5 years. The CDC’s immunization guidelines similarly recommend a tetanus booster if more than 5 years have passed since the last dose and the wound is high-risk. The standard booster is a Tdap (preferred if not previously received) or Td injection. If you have never completed your primary tetanus vaccination series (fewer than 3 doses), you will also need tetanus immune globulin (TIG) in addition to the vaccine, regardless of when you last received a shot. Dog bites are not a high source of tetanus compared to soil-contaminated wounds, but the rule of thumb is straightforward: if you haven’t had a tetanus shot in 5+ years and the skin was broken, get a booster today.
• 5
  What are the signs of infection after a dog bite? Watch for: increasing redness, swelling, or warmth around the wound; pus or discharge; red streaks spreading from the wound (a warning sign of spreading cellulitis); fever or chills; throbbing pain that worsens instead of improving; and swollen lymph nodes near the bite. Any of these signs require immediate medical attention — do not wait.

  NIH/StatPearls (2025) lists the clinical signs of dog bite infection as: redness, swelling, warmth, pus, and lymphangitis (red streaks moving away from the wound toward the lymph nodes). These signs may develop within 24–72 hours of the bite. The infection rate for untreated dog bite wounds ranges from 1% to 30% depending on wound location and depth; hand wounds carry the highest infection risk. Potential complications of untreated infection include cellulitis (skin and tissue infection), osteomyelitis (bone infection), septic arthritis (joint infection), sepsis, and rarely meningitis or endocarditis. The bacterium Pasteurella canis, the most common organism isolated from dog bite wounds, can cause rapid-onset infection with redness and pain typically within 12–24 hours of the bite. If you notice red streaks moving away from the wound toward your armpit or groin, this is a medical emergency requiring immediate care.
• 6
  Do I need to worry about rabies from a dog bite? Usually no, if the dog is known, vaccinated, and can be observed for 10 days. If the dog remains healthy for 10 days after biting, rabies transmission is effectively ruled out. The risk is significant if the dog is unknown, stray, unvaccinated, behaving strangely, or if the bite came from a wild animal (bat, raccoon, skunk, fox). In those cases, start medical evaluation immediately — rabies is 100% preventable before symptoms appear.

  The CDC requires that a healthy dog, cat, or ferret that bites a person be confined and observed for 10 days. If the animal remains healthy throughout those 10 days, rabies transmission is ruled out. Rabies post-exposure prophylaxis (PEP) is approximately $1,000 and is 100% effective if administered before symptoms develop, according to the AAFP. There are approximately 6,000–7,000 documented animal rabies cases per year in the U.S., with bats, raccoons, skunks, and foxes being the most common reservoir species. In domestic dogs in the U.S., rabies is relatively rare due to vaccination programs. However, if the dog cannot be found or identified, contact your local health department or emergency room immediately. The CDC states: “Rabies is 100% preventable in people if medical care is received before symptoms start.” Once symptoms develop, rabies is nearly always fatal — do not wait and hope.
• 7
  What home remedies are safe for a dog bite? The only evidence-supported home treatment is thorough washing with soap and warm water for at least 5 minutes. Applying over-the-counter antibiotic ointment (Neosporin/bacitracin) and covering with a clean bandage is also appropriate for minor surface wounds. No other home remedies — honey, turmeric, garlic, essential oils, or hydrogen peroxide — are recommended by medical authorities for dog bites.

  Mayo Clinic’s first aid guidance is clear: wash with soap and water, apply antibiotic ointment, cover with a bandage. That is the complete evidence-based home treatment for a minor surface wound. The CDC adds that if there is any concern about rabies (unknown dog, strange behavior), povidone-iodine solution (Betadine) diluted 10:1 is recommended for irrigation because it has been shown to be virucidal. What not to use: hydrogen peroxide can damage healing tissue and delay wound closure; concentrated Betadine without dilution can damage tissue; folk remedies involving alcohol, herbs, or essential oils have no clinical evidence supporting their use and may increase infection risk. The most important thing you can do at home is flush the wound thoroughly under running water for at least 5 minutes and then get a medical evaluation if the skin was broken or the wound is on the hands, face, or a joint.
• 8
  When does a dog bite need stitches? Stitches may be appropriate for large, gaping wounds — especially on the face where cosmetic closure is important. However, the Infectious Disease Society of America advises leaving bite wounds open unless there is a compelling cosmetic reason, because closing a dirty bite wound traps bacteria. Deep puncture wounds and wounds involving joints should never be stitched closed.

  NIH/StatPearls (2025) explains the wound closure decision: “The Infectious Disease Society of America advises leaving bite wounds open unless there is a cosmetic concern, such as on the face.” Deep puncture wounds and those involving joint spaces should not be closed under any circumstances. Facial wounds may be closed because of cosmetic importance, but only after thorough irrigation and debridement. The AAFP similarly states: “Wounds may be closed if cosmetically favorable, such as wounds on the face or gaping wounds.” For most dog bite wounds on the hands, arms, or legs, the standard approach is to leave the wound open for drainage to reduce infection risk. If you think you need stitches, a doctor should make that determination — do not attempt to close a dog bite wound with adhesive bandages that seal the wound edges tightly, as this can trap bacteria inside.
• 9
  Which dog bite wounds are highest risk for infection? Highest-risk wounds requiring antibiotic prophylaxis: deep puncture wounds; bites on the hands, feet, or face; wounds that have been closed (sutured); wounds in immunocompromised patients (diabetes, HIV, steroid use, no spleen); and cat bites (which carry a higher infection rate than dog bites due to deep needle-like punctures).

  The AAFP and NIH/StatPearls list the specific high-risk criteria for dog bites that require antibiotic prophylaxis: (1) Deep puncture wounds — these are harder to irrigate and trap bacteria; (2) Hand and foot bites — tendons, joints, and bones are close to the surface, and infection in these areas can rapidly become serious; (3) Face bites — important cosmetically and anatomically; (4) Wounds in immunocompromised patients including those with diabetes mellitus, HIV/AIDS, liver disease, asplenia, or those on corticosteroids; (5) Wounds that have been primarily sutured (closed); (6) Any bite where there is already evidence of infection. The PMC/NIH review confirms that dog bite infection rates range from 1% to 30% depending on wound type and location — hand wounds have the highest infection rate. Cat bites, though less common, are inherently higher-risk than dog bites due to their deep, needle-like puncture wounds that are difficult to clean and may penetrate bone or joint spaces.
• 10
  What information should I gather after a dog bite? Document: the dog owner’s name, address, and phone number; the dog’s vaccination records and veterinarian information; a description of the dog and the circumstances of the bite; the date, time, and location; names of any witnesses; and photos of the wound. Report the bite to local animal control. In most states, this is required by law.

  Gathering information after a dog bite is important for three reasons: medical (knowing the dog’s rabies vaccination status determines whether post-exposure prophylaxis is needed), legal (most states require dog bites to be reported to animal control), and financial (homeowner’s or renter’s insurance often covers dog bite liability). The dog should be quarantined for 10 days by law in most U.S. states. The dog’s owner is legally responsible for providing vaccination records. If the dog’s owner cannot be identified, contact your local animal control and your local health department immediately — both will need to assess rabies risk. Document your wound with photographs before and after first aid treatment. Keep all medical receipts and records. If you plan to consult an attorney about legal liability, the stronger your documentation from the day of the bite, the better your position will be.

Sources: CDC cdc.gov Apr 8 2026 (4.5–4.7M bites/yr; 1 in 5 needs medical care; 30–50 fatalities/yr; 10-day observation healthy animal; povidone-iodine virucidal); NIH/StatPearls ncbi.nlm.nih.gov Apr 10 2025 (polymicrobial median 5 bacteria; Pasteurella canis most common; early Abx <6h → 8% vs 59% delayed; IDSA leave open unless cosmetic; deep puncture/joint never close; first-line amox-clav; MRSA coverage TMP-SMX/doxycycline/clindamycin); AAFP aafp.org (amox-clav = antibiotic of choice; 3–7 days prophylaxis; 10–14 days cellulitis; doxycycline PCN allergy; tetanus >5 yrs dirty wound; rabies PEP $1000 100% pre-symptoms); Mayo Clinic mayoclinic.org (soap/water + ointment + bandage first aid; ER criteria); AAP aapnews (amox-clav 50mg/kg; clindamycin+TMP-SMX PCN allergy; tetanus criteria; Tdap preferred); Children’s Mercy childrensmercy.org (3-day prophylaxis sufficient; 5–7 days for infection; standard dosing); PMC/NIH infection rate 1–30%

Sources: Mayo Clinic mayoclinic.org (soap/water + antibiotic ointment + bandage; ER criteria confirmed); CDC cdc.gov (povidone-iodine 10:1 virucidal for rabies concern; 10-day observation healthy dog); NIH/StatPearls Apr 2025 (early treatment <6h → 8% infection; 59% delayed; no hydrogen peroxide; leave punctures open; IDSA open wound recommendation); AAFP aafp.org (skin broken → medical evaluation; tetanus; rabies assessment; wound closure criteria facial)

Sources: AAFP aafp.org (amox-clav antibiotic of choice; doxycycline PCN allergy adult; 3–7 days prophylaxis; 10–14 days cellulitis); NIH/StatPearls Apr 2025 (amox-clav first-line; IV ampicillin-sulbactam severe; MRSA: TMP-SMX/doxycycline/clindamycin; IDSA leave open); AAP aapnews (amox-clav 50mg/kg children; clindamycin+TMP-SMX PCN allergy child); Children’s Mercy (3-day prophylaxis sufficient; 5–7 days infection; standard not high dose); UCSF IDMP idmp.ucsf.edu (high-risk criteria)

Sources: CDC cdc.gov (4.5–4.7M/yr; 1 in 5 medical attention; $50M+ healthcare costs); NIH/StatPearls Apr 2025 (337K ED visits; early <6h → 8% vs 59% delayed); AAFP aafp.org (rabies PEP $1000; 100% effective pre-symptoms; 4 doses days 0/3/7/14; tetanus >5 yrs dirty wound; TIG incomplete vaccination)

Sources: CDC cdc.gov Apr 2026 (soap/water first; povidone-iodine virucidal; no hydrogen peroxide; 10-day observation); NIH/StatPearls Apr 2025 (median 5 bacteria; Pasteurella canis 12–24h rapid-onset; early <6h → 8% vs 59%; IDSA open recommendation; polymicrobial); AAFP aafp.org (amox-clav antibiotic of choice; dirty wound → tetanus >5 yrs; clean wound >10 yrs; TIG if incomplete series; 3–7d prophylaxis; 10–14d cellulitis); Mayo Clinic mayoclinic.org (complete first aid protocol; ER indications); Children’s Mercy childrensmercy.org (standard dose amox-clav; 3-day prophylaxis; PCN allergy alternatives)

If the skin was broken, see a doctor today. Use these buttons to find urgent care, emergency rooms, or family doctors near you. If bleeding will not stop or the wound is severe, call 911 or go directly to the nearest ER.