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.
Also called black drawing salve or black ointment, ichthammol ointment is a home remedy that can be used for a number of skin dissorders, including boils. Made from sulfonated shale oil it is combined with other ingredients such as petroleum or lanolin to treat all sorts of skin problems on humans and on animals.