Irritation or chafing from running or other vigorous, prolonged exercise.

Skin of the inner thigh is reddened, excoriated, and may be bleeding in severe cases.

Treatment is local therapy, keeping the area clean, dry, and untraumatized by continued exposure to rubbing.

Prevention consists of:

• Avoiding cotton underwear when engaged in vigorous, repetitive physical activity. It gets wet and soggy, becoming an abrasive mass that wears away at the skin.
• Use petroleum jelly to lubricate the area while running.