If a dog bites you, the immediate concerns are wound care, infection risk, and whether you need professional medical treatment. Hundreds of thousands of dog bites send people to emergency rooms each year in the United States alone, and about 3% of those visits result in a hospital stay. What happens next depends on how deep the bite is, where on your body it landed, and the dog’s vaccination history.
First Aid Right After a Bite
If the wound is bleeding, apply gentle pressure with a clean cloth until it stops. Then wash the bite thoroughly with mild soap and running water for at least 3 to 5 minutes. This step matters more than most people realize: flushing the wound significantly reduces the bacterial load from the dog’s saliva and lowers your risk of infection. After washing, apply antibiotic ointment and cover the area with a sterile bandage.
For deeper wounds or bites that won’t stop bleeding after 10 to 15 minutes, head to an emergency room or urgent care. The same goes for any bite on your face, hands, feet, or over a joint. These locations carry a higher risk of complications because the skin is thinner, blood supply varies, and tendons and bones sit closer to the surface.
Why Dog Bites Get Infected So Easily
A dog’s mouth carries several types of bacteria that can cause serious infections in humans. The two most common culprits are Pasteurella and Capnocytophaga. When a dog’s teeth puncture your skin, they push bacteria deep into tissue where your immune system has a harder time reaching it. Puncture wounds are especially problematic because they seal over quickly on the surface, trapping bacteria underneath.
Signs of infection can appear anywhere from a few hours to 14 days after the bite. Watch for:
- Redness and swelling that spreads outward from the wound
- Warmth or increasing pain at the bite site
- Pus or cloudy drainage from the wound
- Fever, chills, or body aches
- Blisters forming around the bite area
In rare cases, bacteria from a dog bite can enter the bloodstream and cause sepsis, which is a life-threatening response to infection. Capnocytophaga infections, though uncommon, can also lead to inflammation of the heart lining or brain membranes. People with weakened immune systems, those without a spleen, and heavy alcohol users face higher risk of these severe complications.
When You’ll Need Antibiotics
Not every dog bite requires antibiotics, but many do. Doctors typically prescribe preventive antibiotics for bites on the hands, feet, face, or genital area; for puncture wounds that penetrate near bone, tendons, or joints; for moderate to severe wounds; and for anyone with a weakened immune system. A standard course runs 3 to 5 days. If you have a mild bite on your arm or leg that you’ve cleaned well and that isn’t near a joint, your doctor may choose to monitor it without antibiotics.
Tetanus and Rabies Concerns
Dog bites count as “dirty wounds” because saliva carries bacteria, so tetanus is a real concern. If you’ve completed your full tetanus vaccine series and your last booster was less than 5 years ago, you’re covered. If your last shot was 5 or more years ago, or if you’re unsure of your vaccination history, you’ll need a booster. People who never completed a primary tetanus series need the vaccine regardless of when their last dose was.
Rabies is the other major concern, though it’s rare in domestic dogs in the United States. The standard protocol is to identify the dog and have it confined and observed for 10 days. If the dog remains healthy for that full period, it was not shedding rabies virus at the time of the bite. This 10-day observation applies even to vaccinated dogs, because vaccine failures, while rare, do occur. If the dog can’t be found or is a stray with unknown vaccination history, your doctor and local health department will evaluate whether you need rabies post-exposure treatment, which involves a series of shots over two weeks.
Children Face Greater Risk
Kids are more likely to be bitten on the head and neck, which makes their injuries more severe on average. The face and scalp have a rich blood supply that helps fight infection, but bites in these areas carry risks of scarring, nerve damage, and structural injury to developing facial bones. Children also have smaller blood volumes, so even moderate bleeding from a facial bite can be more significant. Any bite to a child’s head, face, or neck warrants immediate medical evaluation.
Reporting Requirements and Legal Consequences
Most states require dog bites to be reported to local health authorities or animal control, typically within 24 hours. In many jurisdictions, the treating physician is legally obligated to file the report if one isn’t already made. Once reported, the local health officer investigates the incident, which usually involves confirming the dog’s rabies vaccination status and arranging the 10-day observation period.
For the dog’s owner, a bite can trigger “dangerous dog” designations depending on the severity and circumstances. Many states follow a “strict liability” model, meaning the owner is financially responsible for medical costs regardless of whether the dog has bitten anyone before. Homeowner’s and renter’s insurance policies often cover dog bite liability, and the average hospital stay for a serious bite costs around $18,200, roughly 50% more than a typical injury-related hospitalization.
What Recovery Looks Like
Minor bites that don’t require stitches typically heal within one to two weeks with proper wound care. Keep the area clean, change bandages daily, and watch closely for signs of infection during the first week. Bites that required closure or surgical repair take longer, and your doctor will likely schedule a follow-up visit within 48 to 72 hours to check for early infection.
Deeper bites, especially to hands, can cause lasting stiffness or reduced range of motion if tendons or joints were involved. Physical therapy helps in these cases. Facial bites may need follow-up with a plastic surgeon to minimize scarring. Beyond the physical wound, it’s also common for both adults and children to develop anxiety or fear around dogs after a bite. This is a normal response, and if it persists or interferes with daily life, it’s worth addressing with a mental health professional.