Most cat scratches are minor and heal on their own with basic first aid: rinse the wound, wash it with soap and water, and apply an antibiotic ointment. The whole process takes a few minutes, and a typical scratch closes up within a week or two. But cat claws carry bacteria that can cause real infections, so knowing how to clean the wound properly and what warning signs to watch for matters more than you might expect.
Clean the Scratch Right Away
Start by rinsing the scratch under running water to flush out as much bacteria as possible. Then wash the area with regular soap and water, gently working around the wound. You don’t need a special antiseptic soap. Pat the area dry with a clean towel and apply an over-the-counter antibiotic cream if you have one on hand. Cover the scratch with a bandage to keep it clean, especially if it’s in a spot that rubs against clothing or gets dirty easily.
If the scratch is bleeding, press a clean cloth against it for a few minutes until the bleeding stops. Cat scratches tend to be shallow and narrow, so heavy bleeding is uncommon. Deeper scratches that won’t stop bleeding after 10 to 15 minutes of steady pressure may need medical attention.
What Normal Healing Looks Like
A minor cat scratch goes through a predictable repair process. Inflammation starts immediately: the skin around the scratch turns red, feels warm, and may swell slightly. This is your immune system responding, not a sign of infection. Within a couple of days, new tissue starts forming to close the gap. The scratch will look pink and may feel slightly raised or itchy as collagen fills in the wound, a process that takes several weeks to fully complete even after the surface looks healed.
Most uncomplicated scratches stop hurting within a day or two and look noticeably better within a week. Keep the area clean and dry during this time. Change the bandage daily or whenever it gets wet. Avoid picking at any scab that forms.
Signs of Infection to Watch For
Cat claws harbor bacteria that don’t live on most other surfaces, which is why cat scratches carry a higher infection risk than, say, scraping your knee on pavement. The most well-known risk is cat scratch disease, caused by a bacterium that about 40% of cats carry at some point in their lives. Kittens are more likely to transmit it than adult cats.
Here’s the typical timeline: small skin bumps or blisters appear at the scratch site 3 to 10 days after the injury. In about half of cases, the initial scratch develops into a raised bump that may blister and partially ulcerate. Additional symptoms usually show up 14 to 21 days after the scratch, most commonly swollen, tender lymph nodes near the wound. A scratch on your hand or arm, for example, often causes swelling in the lymph nodes of your armpit or elbow.
Other signs that the scratch has become infected include:
- Increasing redness, warmth, or swelling around the wound after the first day or two
- Red streaks spreading outward from the scratch
- Pus or cloudy drainage
- Fever or chills
- Fatigue that feels out of proportion to a minor scratch
When a Cat Scratch Needs Emergency Care
Most cat scratch infections stay localized and resolve on their own or with a course of antibiotics. But in rare cases, the infection spreads to other parts of the body. Get to an emergency room if you develop a high fever, confusion, severe headaches, seizures, chest pain, shortness of breath, or abdominal pain with nausea or vomiting after a cat scratch. These symptoms suggest the infection has moved beyond the lymph nodes.
People with weakened immune systems are at significantly higher risk for serious complications, including infections that can affect the eyes, liver, or heart valves. If you’re immunocompromised and get scratched by a cat, it’s worth contacting your doctor early rather than waiting to see if symptoms develop.
Tetanus and Rabies Considerations
Cat scratches can introduce tetanus-causing bacteria into the body, so your vaccination status matters. You don’t need a booster if you’ve completed your full tetanus vaccine series and your last shot was less than five years ago. If your last tetanus vaccine was more than five years ago and the wound is dirty or deep, a booster is recommended. If it’s been more than 10 years since your last shot, you need one regardless of wound type. Anyone with an unknown or incomplete vaccination history should get vaccinated after any wound.
Rabies from a cat scratch is uncommon but not impossible. The CDC confirms that rabies can spread through both bites and scratches from infected mammals. The risk is highest with stray, feral, or unvaccinated cats, especially those behaving unusually. Indoor cats that are up to date on vaccinations pose essentially no rabies risk. If you’re scratched by a cat with unknown vaccination status that was acting strangely, contact your local health department for guidance on whether post-exposure treatment is warranted.
How Doctors Treat Infected Scratches
A straightforward infected cat scratch is treated with oral antibiotics, typically for a few weeks. Most people with cat scratch disease recover fully, and mild cases sometimes clear up without any medication at all, just slowly. The swollen lymph nodes can take weeks or even a couple of months to return to normal size, which is unsettling but generally not a sign that something is going wrong.
More serious infections that have spread beyond the lymph nodes require longer courses of treatment, sometimes with more than one antibiotic. Heart valve infections from cat scratch bacteria are particularly tricky because they often don’t show up on standard blood cultures, which can delay diagnosis. These severe complications are rare in people with healthy immune systems.
Reducing Your Risk Going Forward
You can lower your chances of getting scratched (and infected) with a few practical habits. Trim your cat’s nails regularly. Avoid rough play that encourages biting and scratching, especially with kittens. Wash any scratch or bite immediately, even if it looks trivial. Keeping your cat on flea prevention also helps, since the bacteria that cause cat scratch disease spread between cats through flea dirt. A cat that’s flea-free is less likely to be carrying the bacterium in the first place.