I have had constipation for many months, and when it ended i always teetered on the edge of constipation. i started drinking 1 - 3 gallons a day a month or two back. i think i have internal piles, and fecal compaction. should i use senna tea 3 days?

You are drinking way too much water. too much water does not cure constipation . Drink according to your body water loss ( normally 6-7 glasses. Fecal impaction requires a strong laxative and if not relieved an exam by your MD/Gastro Ent. to dis-impact and to also check for internal hemorrhoid's . Eat food with some roughage, PL see your MD and follow his/her guidance to regularize your bowels.