The black spots on the dog's belly may be caused by skin diseases, fleas, fungal infections, etc. You need to go to the pet hospital for examination to make a judgment.

The owner can wipe it with a wet towel. If it can be wiped off, it may be caused by stains on the dog while playing. The owner can collect some black spots on the dog and put them in water to dissolve them. See if the small black spots turn red after dissolving, because the food of fleas is blood. If they turn red after dissolving, then the small black spots will become red. It is the feces of fleas. In this case, you need to use Fulin and medicated soap to help dogs get rid of fleas.

If the dog has black spots after a period of time after taking a bath, you need to check whether the dog’s skin is obviously red, swollen, hairless, etc. You can also go to the pet hospital for examination. If your dog suffers from a skin disease, it also needs timely treatment.

In daily life, you need to pay attention to the hygiene of your dog. Do not bathe for a long time and do not bathe frequently. Generally, bathe once every 1-2 weeks. When bathing, you need to use a bath specially designed for dogs. Do not use human body lotion and antiparasitic medicated soap, etc. Do not use human body wash. This may cause allergies and other conditions in dogs. Moreover, human body wash is alkaline, and dog skin is alkaline. Long-term use will cause dog allergies. The dog's skin and hair are damaged, and the stains on the body cannot be cleaned.