The most common reasons why a cat’s right paw suddenly swells:

1. A cat’s accidental fall or sprain from a height may cause a fracture. After a fracture, Their feet may become swollen. If a cat has a broken bone, it should be sent to the hospital for treatment immediately.

2. In the early stage of hypertensive renal failure, there are phenomena such as swollen eyes and feet. If blood pressure suddenly rises, you must go to the hospital for examination in time.

3. If the cat’s feet suffer from skin diseases such as ringworm, frequent licking may cause inflammation and swelling of the cat’s feet.

4. Cat trauma can cause tissue swelling, usually showing tissue edema, bleeding and swelling.

5. Cat skin allergies can cause local skin redness, swelling, itching, etc. Owners should find the allergens in time. If they are not sure, try to choose a nearby pet hospital for examination and treatment.

6. It may be bacterial interdigital inflammation. A common cause of bacterial interdigital inflammation in cats is that the cat's paws are kept wet for a long time, which leads to a decrease in the resistance of the cat's skin, which in turn causes bacterial infection and paw swelling.

7. The cat’s toenails have not been trimmed for a long time. Cat feet can become swollen due to overgrown toenails.

8. It may be caused by bee stings. A bee sting involves an allergic reaction, and if it's not infected, the swelling should go away in 24 hours or less.