Boys summer rash on the inner thighs may be due to eczema, ringworm, prickly heat and so on, it is recommended that the patient under the guidance of the doctor to clarify the specific cause of the disease, through the drug to carry out treatment. 1. Eczema: For patients with eczema on the inner thighs, glucocorticoid drugs can be used externally, such as hydrocortisone butyrate ointment, dianabed cream and so on. Itching is obvious, can be combined with oral antihistamine drugs, such as loratadine. 2. Ringworm: ringworm is caused by fungal infections, and antifungal drugs are used in the treatment. For example, you can choose ketoconazole lotion for cleaning, you can also use topical terbinafine hydrochloride cream. If necessary, you can take oral itraconazole and other drugs. 3. prickly heat: summer weather is hot, boys easy to sweat, can lead to prickly heat on the inner thighs, this time you need to keep the local clean and dry, wear loose and breathable clothing, external glycerine lotion, prickly heat powder. For boys summer rash on the inner thighs of the patients, it is recommended to go to the regular hospital for examination in a timely manner, under the guidance of a professional doctor standardized treatment. The above drugs need to be used in accordance with medical advice.