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.
Rash treatments include moisturizers, lotions, baths, cortisone creams that relieve swelling, and. antihistamines, which relieve itching. For eczema, the physician may suggest moisturizers called emollients. that retain water in skin, keeping it smooth while soothing any itch. For poison ivy, physicians may recommend. cool showers and calamine lotion, and an antihistamine for severe cases to decrease itching and redness. For. rashes caused by an allergen, including hives, the doctor will need to determine which food, substance, medicine, or insect caused the problem.