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.
Once a cause is identified, treatments for itchy skin may include: Medications. Corticosteroid creams. If your skin is itchy and red, your doctor may suggest applying a medicated cream to the affected areas. He or she may also suggest that you cover these areas with damp cotton material that has been soaked in water or other solutions.