Hello! Welcome to HealthcareMagic! I have gone through your complains and understand your concern. Anal fissure usually constipation is the culprit. So I would generally advice good fibrous diet with some laxative if necessary. Alternatively surgery might be required. The procedure is called Fissurectomy. Consult a general surgeon in your locality for further details. Decreasing weight to get fit requires both a control on diet and increasing physical activity. I understand like many people going to a gym may not be feasible due to various reasons. You could do calisthenics or jump rope which are easy fitness activity that can be done at home. There are tone of youtube videos to guide you in this field. However can start by walking or jogging which ever seems doable for you. And instead of starving and hoping to shed some weight I would advice that you eat small portions of food number of times a day to keep your glucose level maintained enough to stop binge eating. So instead of three meals a day eat split into five which should include snacks. Hope this clarifies your concern. Thank you for the query. Take care Regards, Dr. Vignan Rachabattuni, General & Family Physician