A rash on the inner thigh or near the groin can be caused by close-fitting clothing, leg shaving, or situations that result in little airflow and sweat that can trigger a rash. Common skin disorders ...

Heat rash usually appears in skin folds or on areas of skin where sweat accumulates, such as the armpits, chest, back, arms, and groin. People who live in hot climates, sweat a lot, or are on ...