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Constipation

Also called Can't poop, Backed up, Hard stools

3 min plan56 min with every studyUpdated Sep 27, 2026

Who it's forA man aged 18 to 45 who goes every few days and has to strain.

When to see a doctor
  • Call 911 now: bleeding from your butt that will not stop, or a lot of blood or clots. Black, tarry poop with dizziness, or vomiting blood.
  • Urgent care or your doctor today: black or dark red poop, or bloody diarrhea. Black, tarry poop: 911 or the ER.
  • Call 911 now: new back pain with weakness or numbness in both legs, numbness around the genitals or butt, or new trouble peeing or holding your bowels.
  • Today: no poop and no wind, with vomiting or a swollen belly that will not go down. It can be a blocked bowel. Take no laxative until a doctor has seen you.
  • Your doctor: blood in your poop, weight loss without trying, a new change in how you go, belly pain, or feeling tired all the time.
  • Your doctor: blood or mucus (clear slime) in your poop, or belly pain or bloating that keeps coming back. These can be signs of inflammatory bowel disease.
  • Your doctor: low iron on a blood test, or a close relative who had bowel cancer. The risk rises again past 50.
  • Your doctor: constipation that is regular, not getting better with treatment, or started with a new medicine such as an opioid painkiller.

I am not a doctor. This is not medical advice. This is self-education. Every dose on this page is the one a trial or a label used, quoted from it. It is not a prescription. Talk to a physician who has your history before any medicine or procedure. Blood in your poop, black poop, or weight loss without trying: see a doctor first.