Hi Palak, Acne vulgaris is a multifactorial disease. Stress,anxiety,tension,oily food,dandruff, sunexposure,sleeplessness..etc may precipitate or exacerbate the disease. There may be genetic tendency also. Your skin might be oily. I usually advise in my patients as follow.. - antibitic like minocycline cap 50 mg in morning - isotretinoin cap 5 mg at night - to apply clindamycine gel at night on lesions - cleanse the face with antiseptic facewash like acmed face wash - avoid stress and tension, have good sleep.. You might get good result with above hints after consulting dermatologist. Thanks. Dr. Ilyas Patel MD