There is no need for re-vaccination if the dog has a bulge caused by vaccination. The bulging swelling after the dog is vaccinated is caused by the non-absorption of the medicine. You can use a hot water bottle to apply heat or rub it more to promote the absorption of the medicine. As long as the medicine is absorbed, the swelling will disappear. If the bulge persists or continues to grow, you should take it to a pet hospital for treatment in time. The fluid inside can be directly extracted. In severe cases, it may be necessary to incise and drain the fluid, and apply trauma ointment.

What to pay attention to when vaccinating dogs:

1. If it is a puppy just bought from a big market, it is best to raise it at home for 2 weeks and observe whether there is any Vaccine again under abnormal circumstances to avoid physical decline caused by stress response or interference with the immune plan during the incubation period of the disease.

2. Dogs with unhealthy physiques, such as colds, allergies, severe calcium deficiency or parasitic infections, should be immunized after recovery to avoid unsatisfactory immunity.

3. Dogs that are too young (less than 6 weeks old) should not be vaccinated prematurely due to the presence of maternal antibodies in their bodies.