For the time being, you may help your child by keeping the skin clean, using mild soap, applying a moderate moisturiser frequently, and avoiding triggers like dust, heat, sweat, or new foods or products that could exacerbate the allergy. However, a skin allergy that lasts this long needs to be properly checked. Loose cotton clothing helps reduce irritation. A doctor could recommend an antihistamine or calming cream if the itching is severe, but it's crucial to avoid using random creams, especially steroid creams, without consulting a doctor. Please see a paediatrician or dermatologist to determine the precise cause and administer the appropriate treatment, as it has persisted for seven months.