Itchy rashes in the armpits, legholes and elbowholes may be caused by eczema, prickly heat, ringworm and other diseases, and can be improved by general treatment and medication as prescribed by the doctor. 1. Eczema: If eczema causes itchy rashes in the armpits, legholes and elbowholes, patients should avoid re-exposure to disease-causing factors. Topical glucocorticoid drugs such as trimethoprim and mometasone furoate can be used to provide anti-inflammatory and anti-allergic effects. 2. Prickly heat: Itchy rash in the armpits, legholes and elbowholes may also be caused by prickly heat, and patients should wear loose, breathable clothes to avoid aggravation of the condition. You can use glycerine lotion, which has the effect of anti-itching and astringency, or use hydrocortisone, halometasone and other glucocorticoid drugs, which can relieve itching and promote the inflammation to subside. 3. Tinea corporis: Tinea corporis may also lead to itchy rashes in the armpits, leg pits and elbow pits, patients should pay attention to personal hygiene, keep the local clean and dry. You can use econazole, terbinafine and other antifungal drugs to kill the bacteria. If the armpits, legs and elbow sockets itchy rash, it is recommended to go to a regular hospital for examination, to clarify the cause of the disease, with the doctor standardized treatment.