Hi and welcome to the HCM! Thanks for posting your query here. Irregular periods means you didnt mention whether increased length of bleeding days or shortening of cycle period. Any how I will answer the question. The causes of irregular periods are anaemia, hypothyroidism, genetic causes. Increased bleeding is called menorrhagia. Absence of periods is called amenorrhea. A scanty flow is called oligomenorrhea. At this age the common cause of irregular periods could be anaemia of iron deficiency. The normal Hb level in the blood for your age group will be 12-14mg/dl. If it is below 11 it manifests as anaemia. The symptoms will be easy fatigubility, tiredness, headache, muscular cramps. And white discharge from vagina which is called leucorrhea. Leucorrhea could be because of candid, trichomonas, or simply physiological. The diagnosis depends on the consistency-thick mucus or thin or curd like, colour-white or yellow or green, smell-fishy odour or foul smelling etc. The irregular periods can also be caused by abnormalities in thyroid hormones. Low levels of T3 and T4 will cause amenorrhea. Stress, dieting, strenuous exercise may cause irregular periods. In your case it could be hypothyroidism or iron deficiency anaemia. A blood work will rule out both the conditions. Anaemia can be treated by using Iron and Folic acid preparations two times a day after food. A drastic response can be seen in one week. Foods rich in iron content-meat, chicken, jaggery, spinach, groundnuts, green leafy vegetables will help in restoring the iron levels of the body. A gynae exam will be necessary to confirm the diagnosis of leucorrhea. Hope this is helpful to you. Regards