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.
Antihistamines are medicines that can be used to relieve severe itching and help break this cycle. Often you will find that the itchiness of your skin is reduced when you use regular moisturisers to keep the skin soothed and hydrated, and control the inflammation with topical corticosteroids or other newer medicines.