The symptoms you describe are suggestive of an anal fissure (a small tear in the skin around the anal opening), which can be quite painful. Take a warm sitz bath by sitting in comfortably warm water for 10–15 minutes, 2–3 times a day, especially after passing stools. Apply a suitable topical ointment for pain relief as advised. A laxative/stool softener syrup may be taken for a few days to keep the stools soft. Increase your fibre intake and water consumption to prevent constipation and straining.

According to your complaints and symptoms diagnosis is inching towards Anal fissure which is caused due to passage of hard stool from a tight anal sphincter.

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.

According to the history.. it could be anal fissure. It's tear around anal region which heals with medication generally. Though haemorrhoids could also causes bleeding. And both can occur simultaneously.