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.
Or it may be red or rough or have bumps or blisters. Long-term relief requires identifying and treating the cause of itchy skin. Itchy skin treatments include medications, wet dressings and light therapy. Self-care measures, including using anti-itch products and taking cool baths, also can help.