Are you drinking enough water?

I'm glad you started this thread because I've been wanting to ask someone about my similar problem. At least once a week I can poop, but can't get it all out even though I try my hardest (without trying too hard so it won't my sciatic nerve), so I have to use a lot of toilet paper to clean myself. I'm guessing I'm not exercising enough and not drinking enough water, but I haven't asked a doctor or nurse practitioner yet so I don't know.