Applying a moisturizer and using only soaps that are gentle on the skin
is helpful in this case. Hypothyroidism too causes dry skin
. Please get your thyroid function checked. It could also be due to overuse of AC and heaters. If you have blisters at tip of fingers and dry skin then you need to rule out certain conditions such as diabetes, psoriasis, hypothyroidism, contact dermatitis, atopic dermatitis and malnutrition.
Generalized itching can be due to allergy.