Aldehyde, Ketone, Carboxylic Acid Aldehyde: Aldehyde is an organic compound which contain formyl group. This functional group, in its structure R-CHO, consist of carboxyl centre bonded to R group and hydrogen.
1 Infections, bites and stings, infestations, chronic diseases, allergic reactions, sun exposure, and dry skin are among the numerous causes of itching.  Anti-itch creams and lotions containing camphor, menthol, phenol, pramoxine (Caladryl, Tronolane), diphenhydramine (Benadryl), or benzocaine can bring relief.
1 If the itch can be controlled, the rash (which is aggravated by vigorous scratching) may be more readily treated. 2  Treatment of atopic dermatitis is centered around rehydrating the skin with emollients like petroleum jelly and the cautious use of topical steroids to reduce inflammation and itching.