The small black spots around the dog's urethra may be caused by endocrine disorders or melanin deposition. If the dog has an enlarged abdomen, drinks too much water, frequent urination, symmetrical hair loss, etc., it is best to take the dog to the pet hospital for examination. Next, confirm the cause of the disease and treat it promptly to avoid delaying the condition; if the dog does not have other abnormal symptoms, then you need to pay attention to the dog's hygiene, bathe and deworm regularly, and do not feed the dog food that is too oily or salty.