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Brown discharge could be due various causes which include hormonal imbalances, breakthrough bleeding, ovulation bleed, vaginal infections, uterine fibroids, endometrial problems etc. The exact cause can only be made out after careful evaluation one by your doctor/gynecologist. Treatment as appropriate would be started (based on examination findings and investigation results to help you regulate your periods. Be in regular monitoring and follow-up with your treating doctor/gynecologist and report any new/abnormal symptoms immediately. Take adequate rest. Drink plenty of water. Maintain healthy diet and lifestyle.
Take care.