Patchy baldness treatment with minoxidil is usually effective. Patch baldness is commonly known as “ghost shaving”, belongs to a common non-scarring hair loss, the cause of the disease is not completely clear, usually thought to be related to genetic factors, neuropsychiatric factors, autoimmune factors, endocrine disorders and so on. Minoxidil is a commonly used drug for the treatment of hair loss, which is mainly used for the treatment of androgenetic alopecia and patchy baldness, etc. The drug can improve the microenvironment of hair growth, thus promoting the occurrence and growth of hair, thus achieving the therapeutic purpose, so patchy baldness treatment with Minoxidil will have a certain effect. The drug may have adverse effects such as scalp irritation and itching, and overdose can also lead to adverse effects such as low blood pressure. Those who are allergic to Minoxidil or any other ingredients in the drug need to be prohibited from using it. It is recommended that patients with pemphigus go to a regular hospital in a timely manner, after a clear diagnosis, follow the doctor’s instructions, using the appropriate treatment program, do not self-medication, so as not to cause serious adverse consequences.