Maybe due to fissures...Drink adequate fluids. Fluids help prevent constipation. Exercise regularly. Engage in 30 minutes or more of moderate physical activity, such as walking, most days of the week. Exercise promotes regular bowel movements and increases blood flow to all parts of your body, which may promote healing of an anal fissure...Sitz baths after bowel movements and as needed provide significant symptomatic relief because they relieve some of the painful internal sphincter muscle spasm...First of all you should start taking a high fibre diet, incorporate more of fruits, green leafy vegetables and salads in diet.. Drink plenty of water....You should always take walk after meals and follow daily workout regime....With that fallow relaxation techniques like yoga, meditation,avoid alcohol, smoking, coffee, tea...take syp duphalac 10 ml at night time with milk or warm water....if no improvements consult surgeon.