Severe pain after passing stool.

Your condition strongly aligns with an anal fissure. Because your symptoms have lasted for 25 days and involve dark-red blood, it is very important to consult a general surgeon or a gastroenterologist for a proper diagnosis. While the hard stools explain the likelihood of a fissure, dark-red blood—as opposed to bright red streaks—warrants a professional medical evaluation to completely rule out other conditions higher up in the digestive tract. You can use-Stool Softeners or Osmotic Laxatives, Ointments containing local anesthetics like Lidocaine, Take Warm Sitz Baths, Do not strain, push, or sit on the toilet for extended periods. However please consult a general surgeon or a gastroenterologist for a proper diagnosis.

Symptoms described correspond to fissure in ano. Sitting in lukewarm water with your anal region dipped inside that for 10-15 mins twice daily along with ointment for local applications will help. Bit first visit a general surgeon, sometimes assumptions lead to wrong treatment. A good physical examination will help.

Visit a general surgeon

Drink plenty of water/liquids (2-2.5l) per day to avoid constipation. Have some laxatives to ease that for the time being; movicol, lactulose etc can help. Take surgeon consultation in person before starting