Consipation

Dehydration, lack of exercise, b*edrest, medications (narcotics, anticholinergics, antidepressants, calcium channel blockers-verapamil, aluminium contining antacids), laxative abuse,megacolon, spastic colon, chronic suppression of the urge to defecate, fecal impaction, neoplasm, intestinal obstruction, vascular occlusion to the bowel, inflammatory lesions (diverticulitis, proctitis, hemorrhoids, anal fissures), neurologic disorders, depression, porphyria, hypothyroidism.