Causes and solutions for the obvious bulge in the back spine of dogs:

1. The dog may have been hit by a violent external force. The owner should take the dog to the hospital for medical treatment in time to avoid delaying the condition.

2. It may be that dogs have congenital spinal abnormalities. There is generally no treatment for congenital diseases, and the owner can only take more care of them in daily life.

3. The dog may be suffering from tumors. People can take the dog to the hospital for pathological examination to determine whether the tumor is benign or malignant and take timely treatment measures.

4. The dog may be too thin, so you must pay more attention and try not to let the dog exercise vigorously to avoid injury to the dog.