If the swelling is caused by poor local circulation, you can gently massage the cat's toes or apply hot compress to promote blood circulation and help relieve swelling.

If you suspect that the swelling is caused by a skin disease, such as a fungal or bacterial infection, it is recommended to take the cat to a pet hospital for a blood test. Examination and microscopic examination of local skin secretions to confirm the cause and extent of the disease. Depending on your doctor's advice, oral or topical medications may be needed to treat skin conditions.