There are many reasons for the itchy red bumps on the inner thighs, including prolonged sweat stimulation, fungal infections, eczema and so on. 1. prolonged sweat stimulation: summer weather is hot, patients are more prone to sweating, if the patient has a long time sedentary habits are more likely to occur in the inner thighs for a long time with sweat stimulation, and the part of the skin is more thin and tender, in the prolonged sweat stimulation is prone to produce red pimples, and there will be itchy symptoms appear. 2. Fungal infection: the common cause of the symptoms of fungal infection, in the local hot and humid state is more likely to lead to dermatophyte infection, resulting in erythema, pimples, flaking, etc., but also accompanied by intense itching. 3. Eczema: If the patient is exposed to their own allergens or recent immune deficiency and other reasons, it can lead to the onset of eczema on the inner thighs, which can also be manifested as red bumps on the skin accompanied by itching symptoms. There may also be other reasons, it is recommended that patients go to the hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.