Constipation
Constipation is a health condition when you pass stool infrequently or less than three times per week, and causes painful bowel movements. The major cause of this health condition is the blockage or hindrance in the rectum, often due to insufficient amounts of fiber in your diet. It could also result from changes in diet or physical routine. It is best to seek immediate medical attention when you start to experience symptoms of this condition.
Common symptoms of constipation include severe pain, bloody stools, or irregular bowel movements that last for several weeks. Constipation can also cause tears in the lining of the anus, known as anal fissure.
Medication
Some common drugs can cause bloody stools. Non-steroidal anti-inflammatory drugs (NSAIDs) like diclofenac and ibuprofen can cause bleeding in the GI tract. Other medications that may trigger rectal bleeding are platelet inhibitors such as acetylsalicylic acid, clopidogrel, and prasugrel. Anticoagulants like vitamin-K antagonists, heparin, or direct oral anticoagulants can also have these side effects. Some drugs can cause your feces to take on a darker color but usually isn’t as a result of bleeding, like iron and bismuth.
Elderly persons may experience this symptom as a result of their advancing ages. Drug interactions can also cause this symptom.