Skin diseases in dogs are contagious to people, and stray dogs that frequent garbage dumps or are weak and sickly can easily contract skin diseases that may be caused by bacterial spores or parasites, or various skin diseases caused by psoriasis. If a person comes in contact with it, he or she will be infected if he or she does not pay attention to hygiene. Skin diseases that occur after a person is infected are commonly known as ringworm, psoriasis, and ringworm of cats. The initial manifestation is a redder papule with itching, and in severe cases, the skin can break and ulcerate, which requires timely use of hormonal ointments or anti-inflammatory ointments, such as dermaplanin, erythromycin ointment, and dexamethasone ointment. In addition, people with pet dogs at home should regularly give their dogs deworming vaccinations to ensure a healthy canine life, but also regularly give it a bath, and people should also pay attention to maintaining personal hygiene.