If your skin in dry, it may feel taut, itchy and rough to the touch. Redness, cracking and flaking are also signs of dry skin and an impaired skin barrier.
Cold weather, harsh soaps and detergents, long hot baths and showers, skin conditions like eczema and psoriasis and medical conditions like an underactive thyroid are the biggest causes of dry skin.
Ingredients like glycerin, urea, lactic acid and hyaluronic acid are known as humectants and help attract water to your skin. Lanolin or petrolatum are known as occlusive ingredients which create a seal to reduce transepidermal water loss.
Also look out for other skin soothing and smoothing agents like ceramides to repair your skin barrier.
Use a very mild gel or cream cleanser for washing the face morning and evening and then layer a hydrating serum under your moisturiser to boost hydration further.
Use of a soft exfoliating glove or mitt in the shower once or twice a week to massage in a body wash containing lactic acid can help reduce rough or bumpy skin on the body known as keratosis pilaris. I would avoid face or body scrubs on very dry skin as it is likely to increase irritation and discomfort.
Heavily fragranced and foaming skincare products tend to dry skin out further. Alpha hydroxy acids, such as glycolic acid, and vitamin A creams, such as retinol, are probably best avoided in dry skin until it has been fully addressed.