Why does running cause chafing on the inner thigh?

Chafing and skin breakdown on the inner thigh during running may be related to wearing inappropriate clothing, obesity, lower limb deformities, and other factors. It is recommended to promptly undergo relevant examinations, establish a clear diagnosis, and receive early treatment to prevent worsening of the condition and prolonged recovery.

1. Clothing Factors

Clothing made of stiff fabric or that does not fit properly can rub against the delicate skin of the inner thigh. Prolonged friction between the clothing and skin may lead to wounds and pain.

2. Obesity

In individuals with obesity, the subcutaneous fat on the thighs is thick and soft. During walking or running, the inner thigh skin easily comes into contact and rubs together. Especially during running, due to increased intensity and frequency of friction, localized chafing, injury, and skin breakdown can occur, leading to pain.

3. Lower Limb Deformities

When patients have lower limb deformities, their running posture becomes abnormal. This improper posture can cause repeated friction between the inner thigh areas, resulting in skin breakdown. The most common lower limb deformity is knock-knees (X-shaped legs), which may result from congenital developmental abnormalities or genetic factors. To fundamentally resolve the issue, orthopedic correction is usually required.

After skin breakdown occurs on the inner thigh, it is important to protect the wound. Locally apply povidone-iodine solution externally once in the morning and once in the evening. Avoid moisture and excessive sweating at the site to prevent bacterial growth. If possible, stay at home and keep the wound exposed; if going out is necessary, cover the wound with sterile gauze to prevent repeated friction and worsening of the injury.