My son has excema and i want to know how much hydrocortisone to yse?

HC cream; moisturize: With mild or moderate eczema, hydrocortisone 1% cream (use a thin coat on the rash twice a day, for 4-8 days) is cheap, found at most stores, and works well. Daily moisturizing cream (Cetaphil, CeraVe, Eucerin, etc.) used 2-4 times a day helps to heal eczema and to prevent return of the rash. One can avoid creams with lanolin, aloe, or fragrances if sensitive to those ingredients. Avoid soaps.