Ms contin (morphine) for 3 days for sciatica pain. came down with severe constipation. took laxative, anus hurts when passing stool and even at rest.causes?

Meds& Constipation: Constipation with chronic pain or after surgery is a common due to the disruption of normal metabolism, and compounded by use of narcotic pain medications. It is important to stay well hydrated during this period (and stool softeners won't work properly without adequate fluid intake) and to walk as frequently as permissible (let your doctor and your comfort level be your guide).

Hemorrhoids: You must have strained quite a bit, apply a topical hemorrhoid cream to soothe it, and warm baths should also ease it

Narcotic Related: Need to increase fiber intake - use natural laxative like bran, metamucil, senna. Eat plenty of high fiber fruits like prunes, apples,