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.
Skin Disorders. People have been using Licorice Root salves and poultices in the treatment of skin rashes, eczema, psoriasis, and dry and itchy skin. A small clinical study has shown that the demulcent and anti-inflammatory agents in Licorice Root extract gel may reduce the symptoms of atopic dermatitis (eczema).