Dry skin: Abnormally dry skin. Can be caused by a dry climate, winter weather, severe deficiency of vitamin A, systemic illness, overexposure to sunlight, or medication. The skin loses moisture. It may crack and peel. Or it may become irritated, inflamed, and itch. Bathing frequently, especially with soaps, can contribute to dry skin.
With dry skin, it can help to keep baths or showers short in warm water with as little soap as possible, drying the skin gently -- pat without rubbing. Dry skin can also usually be addressed by the use of over-the-counter (OTC) topical preparations for dry skin. If these products do not relieve the condition, see a dermatologist for more specific remedies.

Dry skin is often temporary — you get it only in winter, for example — but it may be a lifelong condition. Signs and symptoms of dry skin depend on your age, your health, where you live, time spent outdoors and the cause of the problem. Dry skin is likely to cause one or more of the following:

A feeling of skin tightness, especially after showering, bathing or swimming
Skin that feels and looks rough
Itching (pruritus)
Slight to severe flaking, scaling or peeling
Fine lines or cracks
Gray, ashy skin
Redness
Deep cracks that may bleed

Dry skin (xerosis) often has an environmental cause. Certain diseases also can significantly affect your skin. Potential causes of dry skin include:

Weather. Skin tends to be driest in winter, when temperatures and humidity levels plummet. But the season may not matter as much if you live in desert regions.
Heat. Central heating, wood-burning stoves, space heaters and fireplaces all reduce humidity and dry your skin.
Hot baths and showers. Taking long, hot showers or baths can dry your skin. So can frequent swimming, particularly in heavily chlorinated pools.
Harsh soaps and detergents. Many popular soaps, detergents and shampoos strip moisture from your skin as they are formulated to remove oil.
Other skin conditions. People with skin conditions such as atopic dermatitis (eczema) or psoriasis are prone to dry skin.

https://www.google.co.in/search?q=dry+skin&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjXuZnh7eDXAhUJ6Y8KHfM6DSQQ_AUICigB&biw=1366&bih=613#imgrc=4cZhZ9HHd3QnEM:
https://www.medicinenet.com/script/main/art.asp?articlekey=30650
https://www.mayoclinic.org/diseases-conditions/dry-skin/symptoms-causes/syc-20353885