As much as I'd like to help you more, I don't feel it'd be in the interest of HR for me to state my dosages....I haven't met a single person in real life that could tolerate my dosages...so I actually don't really tell anyone in real life either.
But what I will tell you is, yes, it certainly will cause constipation, just like any other opioid....if it's such a big problem for you, I'd say first best recommendation is ditch the kratom if possible. If that's not necessarily feasible for any reason, then I believe there are many things you can get OTC for this (softeners, stimulants, etc), if these are no help, see a doctor.
Kratom will basically come with a mix of mild opioid and mild stimulant type effects some those are the alkaloids it contains, so the side effects will be generally the same. As for effects on your health, there's barely anything factually known yet in this regard, but I have come across a fair bit of anecdotal evidence of a possible relationship/correlation between overconsumption of kratom and liver damage.