cracker skin

Many types of dermatitis
Dermatitis — an inflammation of the skin — usually appears as swollen, red and itchy skin. It has many causes and occurs in many forms, including contact dermatitis and atopic dermatitis. Dermatitis isn't life-threatening or contagious, but it can be uncomfortable or even painful.
Though signs and symptoms vary from person to person, types of dermatitis are typically identified by their hallmark appearance. Here's a look at dermatitis pictures, showing classic signs and symptoms. Many types of dermatitis
Dermatitis — an inflammation of the skin — usually appears as swollen, red and itchy skin. It has many causes and occurs in many forms, including contact dermatitis and atopic dermatitis. Dermatitis isn't life-threatening or contagious, but it can be uncomfortable or even painful.
Though signs and symptoms vary from person to person, types of dermatitis are typically identified by their hallmark appearance. Here's a look at dermatitis pictures, showing classic signs and symptoms. Generally, a white patch on skin isn't cause for concern. Sometimes a small area of skin becomes irritated or develops mild eczema, which results in a patch of skin that's lighter in pigment than is the skin around it. This is particularly common in children who have allergies, asthma or eczema. Your son's doctor may recommend applying moisturizer to the affected skin and avoiding harsh or drying soaps.
Another possible cause of a white patch on skin is a superficial yeast infection (tinea versicolor), which may cause the skin to look either lighter or sometimes darker than normal. In this case, treatment may include antifungal creams or shampoos.
If the white patch on your son's arm continues to enlarge or if additional white patches appear in other places, consult a dermatologist for an evaluation. Various other skin diseases — including psoriasis and vitiligo — also may cause a light or white patch on skin. Generally, a white patch on skin isn't cause for concern. Sometimes a small area of skin becomes irritated or develops mild eczema, which results in a patch of skin that's lighter in pigment than is the skin around it. This is particularly common in children who have allergies, asthma or eczema. Your son's doctor may recommend applying moisturizer to the affected skin and avoiding harsh or drying soaps.
Another possible cause of a white patch on skin is a superficial yeast infection (tinea versicolor), which may cause the skin to look either lighter or sometimes darker than normal. In this case, treatment may include antifungal creams or shampoos.
If the white patch on your son's arm continues to enlarge or if additional white patches appear in other places, consult a dermatologist for an evaluation. Various other skin diseases — including psoriasis and vitiligo — also may cause a light or white patch on skin.