Usually, you need to see a dermatologist for patchy baldness, which manifests as a sudden patchy loss of hair and is associated with factors such as genetics and endocrine disorders. Patchy baldness is a common non-scarring hair loss condition, and usually requires a visit to a dermatologist. The typical symptom of pemphigus vulgaris is sudden patchy loss of hair without inflammation or other abnormalities in the area of hair loss, characterized by round or oval areas of hair loss of varying sizes with clear boundaries. The etiology of patchy baldness is not yet completely clear, and studies have shown that it may be related to heredity, endocrine disorders, mental stress, insomnia, neurasthenia, pathogenic microbial infections, allergies and other factors, and may also be secondary to hyperthyroidism, vitiligo, dry syndrome and other diseases. Patchy baldness exists the possibility of natural healing, but there is also the possibility of recurrence. When patients are diagnosed with pemphigus vulgaris, they need to strengthen their daily life management, such as eliminating possible triggering factors, paying attention to the combination of work and rest, actively cooperating with the doctor to carry out standardized treatment when necessary, and returning to the clinic on time.