A piece of the inner thigh growing like ringworm may be a symptomatic manifestation of ringworm, red ringworm, chronic eczema and other diseases, and should be promptly consulted to identify the cause. 1. ringworm: an infectious disease caused by dermatophytes, most commonly found in the groin, anus, buttocks and other parts of the groin, starting with red papules, followed by ring-shaped ringworm-like lesions, accompanied by itching and other symptoms. 2. ringworm: limited superficial infectious disease of the skin caused by microscopic rod-shaped bacteria infection, easy to occur in the groin near the skin lesions for the clear boundaries, the edge of the irregular-shaped red patches. In the groin, inner thighs and other friction-prone areas, can cause itching and mossy changes. 3. Chronic eczema: the inner thigh grew a piece of ringworm like things may also be chronic eczema caused by its main performance for the affected area of the skin can appear pimples, scales, local skin roughness, there are varying degrees of mossy changes and hyperpigmentation, etc., accompanied by paroxysms of obvious itching sensation, scratching is easy to cause the skin to break down and cause bacterial infections. In addition, the inner thigh skin lesions, not necessarily ringworm, the patient can not judge the condition, should go to the hospital dermatology department in a timely manner, to clarify the cause of the disease, under the guidance of the doctor to carry out the appropriate treatment.