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.
Medicines that relieve itching include: 1  Over-the-counter antihistamine pills or tablets such as Benadryl (diphenhydramine) and prescription antihistamine pills such as Vistaril (hydroxyzine). 2  Over-the-counter hydrocortisone products, such as Cortaid, Caldecort, or Lanacort, that you spread on your skin.