CAUSES OF DARK INNER THIGHS Dark inner thighs can be caused by various factors, such as: 1. Friction: Friction caused by tight clothing, continuous walking or running, and obesity can result in Amazon.com : Vcetree Skin Bleaching Cream Skin Lightening for Body Intimate Areas, Private Parts, Underarm, Knees, Elbows, Inner Thigh, Bikini Area, Whitening Cream Dark Spot Remover For Intimate Areas (1FL OZ) : Effective Tips to Lighten Dark Inner Thighs Inner Thigh Pigmentation Treatment in Delhi Influennz Clinic What options do I have for lightening severe contrast darkness in my inner thigh? (Photo)