Dark inner thighs occur as a result of the overproduction of melanin (hyperpigmentation). This can occur as a result of certain medications, sun exposure, dry skin, certain medical conditions, and even due to friction as a result of tight clothing.
Dark Inner Thighs - Causes, Prevention, and Treatment
Dark inner thighs are a concern for many. While most of them might be temporary solutions, there are also permanent ways to lighten dark inner thighs.