What are the common causes and treatments for a rash on a dog's tail?

Common causes of a rash on a dog's tail can include Allergies, parasites, infections, or skin irritants. Treatments may involve identifying and removing the underlying cause, topical medications, antibiotics, antihistamines, or corticosteroids prescribed by a veterinarian. Regular grooming and maintaining good hygiene can also help prevent rashes on a dog's tail.