Bitten by a cat, no broken skin but there is a red mark.
Nov 25, 2025
Source: Cainiu Health
Dr. Wang Lei
Introduction
Although the skin was not broken after being bitten by a cat, there is a red mark. Immediate local treatment and close observation are necessary. Even without a break in the skin, the skin barrier may still be compromised, posing a risk of infection that should not be ignored. If the redness persists or worsens, or if pain, swelling occurs, or the cat's origin is unknown, prompt medical attention is recommended. A cat's mouth contains bacteria and viruses, and even unbroken skin may be at risk.
If bitten by a cat without broken skin but with a red mark, immediate local treatment and close observation are necessary. Even if the skin is not broken, the skin barrier may still be compromised, posing a risk of infection that should not be ignored. If the redness worsens continuously, pain or swelling develops, or the cat’s origin is unknown, prompt medical attention is recommended.
Cats' mouths contain various bacteria and viruses. Even without visible breaks in the skin, there may be microscopic wounds at the site of the red mark, allowing pathogens to enter the body and cause local inflammation or infection, such as cat scratch disease.
For emergency care, wash the affected area and surrounding skin thoroughly with soap and water for at least 15 minutes, then rinse well under running water to reduce pathogen residue. After cleaning, gently pat dry with a clean towel, avoiding friction or irritation to the marked area.
Keep the affected area clean and dry in daily care to prevent bacterial growth from moisture exposure; avoid squeezing or rubbing the red mark, and wear loose, breathable clothing to minimize friction. Monitor the redness closely for any changes, and avoid further contact with unfamiliar cats or those that have not been vaccinated.
