The darkening of the thighs of women may be caused by friction, ringworm, acanthosis nigricans and other reasons.
1. Friction: if women often wear tight pants, or long time friction between the legs, it will stimulate the local melanin cells, leading to excessive melanin production, and a large number of deposits in the local skin, causing black thighs on both sides of the symptom.
2. ringworm: if the patient does not pay attention to the local trauma, it will lead to the skin ringworm bacteria to stimulate the local stratum corneum cells, produce inflammatory reaction. When the local skin lesions gradually subside, it will make the patient’s local temporary pigmentation, thus causing the symptoms of darkening on both sides of the thighs of women.
3. Acanthosis nigricans: when women have black thighs, it may be caused by acanthosis nigricans, which is mainly due to genetic factors, autoimmunity decline, the use of drugs and other reasons. The main manifestation is that the skin appears gray or brownish-yellow, followed by the deepening of melanin.
When women have black thighs on both sides, they can go to the hospital in time for examination to clarify the cause of the disease and treat the symptoms.