The symptoms of red patches on the inner thighs are not necessarily AIDS, but may be ringworm, psoriasis and eczema and other diseases, the appearance of red patches on the inner thighs should be timely consultation, please ask the doctor for a clear diagnosis. 1. AIDS: In addition to the symptoms of red patches on the inner thighs, AIDS can also have fever, fatigue, sore throat, general discomfort and other symptoms of upper respiratory tract infections, and symptoms such as enlarged lymph nodes. HIV antibody test can be performed to make a clear diagnosis. 2. Ringworm: It is a fungal infectious skin disease, mostly seen in skin areas with high temperature and humidity. It can be treated with compound resorcinol coating or 1% econazole or clotrimazole cream, and attention should be paid to keep the skin dry and clean. 3. Psoriasis: Mostly hereditary disease, erythema on legs is often manifested as lesions with clear boundaries, covered with thick scaly plaques and grayish-white scales. It can be treated with tazarotene gel. 4. Eczema: Eczema can occur in any part of the body, often symmetrically distributed, the initial stage of erythema, self-conscious burning, itching, and later in the erythema on the scattered or dense papules or small blisters. It can be treated with antihistamines. The red patches on the inner thighs are not necessarily AIDS, you should go to the hospital in time to improve the examination, under the guidance of the doctor for diagnosis and treatment of medication.