Why does a bulge bulge after a cat bites

1. Capillary damage: Usually there are many capillaries under the skin of the human body. After being scratched by a cat, the capillaries rupture, and the patient may suffer from Local bulge phenomenon.

2. Allergy: If the patient develops a bulge accompanied by itching after being scratched by a cat, it is considered an allergy.

3. Infection: Since cat claws are not clean objects, when the human body is scratched by a cat and there is local infection, bulging, pain, and increased skin temperature may occur.

4. Contact dermatitis: Contact dermatitis refers to the local acute or chronic inflammatory reaction caused by single or multiple contact of skin and mucous membranes with animal, chemical and plant substances. Cat scratching is an animal cause, and patients may experience bulging.

5. Cat-scratch disease: When the human body is scratched or bitten by a cat, Bartonella henselae invades the human body. One to several erythematous papules may appear locally, and a few papules may turn into blisters or pustules. Most patients have symptoms such as fever, fatigue, and anorexia.

When a patient develops a bulge after being scratched by a cat, he or she must disinfect the wound promptly and seek medical attention as soon as possible. The doctor will determine the treatment method according to the specific situation, and also determine whether rabies vaccine, tetanus vaccine, etc. are needed.