I can understand your concern,
was it frank blood or blood streaked stools?
since its normal now, you do not need to do any thing, take a high finer diet and a bowl of curd after food everyday. drink lots of water. avoid maida and its products.
kindly consult a general surgeon if it happens again.
Dr. Anil kumar jain.
Maybe due to fissures... Since it was single episode nothing much to worry just get clinical examination by nearest surgeon and Add fiber to your diet. Eating about 25 to 30 grams of fiber a day can help keep stools soft and improve fissure healing. Fiber-rich foods include fruits, vegetables, nuts and whole grains. You also can take a fiber supplement. Adding fiber may cause gas and bloating, so increase your intake gradually.
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...regards.