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.
Alternative Skin Treatments. There are many things you can put on your skin to relieve itching, burning, and redness: Aloe vera: It soothes skin and may improve psoriasis, although scientists haven't studied it enough to know for sure. Look for creams or gels that have 0.5% aloe. Steer clear of the tablet form. It can be dangerous. Tea tree oil: It's sometimes added to shampoos and may help scalp psoriasis.