Hallo Mr. Prasad, Welcome to HCM Pimples [Acne ] is a common inflammatory human skin disease and are terrible enemies for our beauty. It affects mostely skin with the densest population of sebaceous follicles area include the face. Hormonal activity , genetic component , stress , infectious bacterias and high glycemic load diet are the main cause of pimples. Pimples occurs most commonly during adolescence and after continue into adulthood. However, no way to predict how long it will take to disapper entirely and some individuals will carry this condition will into their thirtees, fourties and beyond. Here are my precious tips to prevent or treat them, 1.Wash face 2- 3 times daily. 2.Use a mud mask once a week to clean out pores. 3.Drink plenty of water to flush out impurities. 4. Keep your hands away from face. 5.Avoid fats, nuts and spicy oily foods. 6.Aloe vera can be taken internally as well as applied on the affected area.