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.
Over-the-counter med: For flea bites, one can take claritin, zyrtec, or Benadryl (diphenhydramine) to block histamine that causes itching. Hydrocortisone 1% cream 2-3 times a day on the bites for about 5 days will help them go away. For more itch relief, one can put an anti-itch gel such as itch-x on bites. Itch-x has an anesthetic to numb the itch. If bites are growing or painful, a doctor can evaluate.