This dryness of skin( xerosis) could be due to dry weather, use of harsh soaps, central air conditioners or warmers or due to pathological factors like psoriasis
, eczema, thyroid
disorders etc. You may follow these suggestions to keep skin well hydrated
1) use Luke warm water to bathe as hot water dries skin
2) use a mild soap like dove, cetaphil
3) apply a moisturiser immediately after bath and in evening. Use a lactic acid or urea based moisturiser.
4) to treat dry cracked heels- soak them in warm water twice in a day. Apply a steroid salicylic acid
based ointment under occlusion for few days to help cracked heels heal. Once they heal make it a point to moisturise them daily with a urea or lactic acid based moisturiser or cream.
Hope that answers your query. Take care.