Hair fall out when tugging may be caused by physical factors, or ringworm, systemic lupus erythematosus and other diseases. 1. Physical factors: if usually often beautiful hair, or tie a very tight braid, combing hair, the hair follicle pulling excessive, it is easy to appear a tug of hair fall. 2. Ringworm of the head: this disease is an infectious disease caused by dermatophytes, such as Trichophyton mentagrophytes and Trichophyton purpureus, which can be transmitted through indirect contact. The common symptoms are hair loss, hair breakage, which may be accompanied by scales, itching and other discomforts, and in some cases, the phenomenon of hair falling out when tugging may occur. 3. Systemic lupus erythematosus (SLE): The cause of the disease has not been fully clarified, and studies have shown that it may be related to genetics, ultraviolet radiation. Pathogenic microbial infections, estrogen level disorders and other factors, patients will appear butterfly-shaped erythema, mucosal ulcers, alopecia and baldness and other symptoms, which can be manifested as hair falling out when tugging. There may also be resting alopecia, seborrheic alopecia, etc. When the patient happens to have hair falling out with a tug, he should go to the hospital for consultation, complete the relevant examination and clarify the cause.