If a cat has a bulge after being vaccinated, it may just be a reaction to the vaccine; if the cat is bitten by fleas and other parasites and causes a skin infection, there will also be a bulge on the neck; owners can also try If the cat feels pain when you touch the bulge, it may be a tumor and requires medical examination.

The cat has a soft bulge on its neck

1. If the cat bulges after being vaccinated, it may just be a reaction after the vaccine. The owner can use a warm towel to apply heat to it.

2. If a cat is bitten by fleas and other parasites and causes a skin infection, there will also be a bulge on the neck. The owner can peel off the cat's hair and check the skin. If there are parasites, the cat needs to be dewormed. Owners should remember to deworm their cats regularly, once every three months internally and once a month externally.

3. The owner can also try to touch the bulge. If the cat feels pain, it may be a tumor and requires medical examination.