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.
Topical medication can also provide mild symptom relief to stop pain, itching, or burning caused by the skin lesion. If your skin lesions are the result of a systemic infection, such as shingles or chicken pox, you may be prescribed oral medications to help ease the symptoms of the disease, including skin lesions.