Steroids (short for corticosteroids) are synthetic drugs that closely resemble cortisol, a hormone that your body produces naturally. Steroids work by decreasing inflammation and reducing the activity of the immune system.teroids (short for corticosteroids) are synthetic drugs that closely resemble cortisol, a hormone that your body produces naturally. Steroids work by decreasing inflammation and reducing the activity of the immune system.
A wide variety of chemicals have the potential to irritate the scalp and cause pain and sensitivity. Although virtually any chemical can potentially cause scalp sensitivity, harsh chemicals such as hair dye, permanent wave solution and hair straighteners are more likely to cause pain and sensitivity than shampoos, conditioners and other everyday hair products.
An itchy scalp is an inflammatory reaction of the skin underneath the hair on your head. An itchy scalp is a common problem, particularly among adults. An itchy scalp may or may not be associated with a visible rash or broken skin. The severity, frequency and duration of an itchy scalp depend on the underlying cause. Some causes of an itchy scalp, such as dandruff (seborrheic dermatitis), can be relatively minor. However, an itchy scalp can also be due to more serious conditions, such as infection, inflammation, parasite infestation, autoimmune disorders, and allergies.