I can drink water everyday but still have to take a laxative every saturday nite to clean my self out what wrong. this been going on for years.. ?

Constipation or...?: A medical definition of "constipation" is bowel infrequency (less than one bowel movement every 3-4 days). You have not indicated your stool frequency, but your question implies that you feel incompletely evacuated. Possibliities include: Slow GI transit, pelvic floor dysfunction, ano-rectal problems, partial obstruction, occult inflammation, Irritable Bowel Syndrome, etc. Time for evaluation pls.