If you have a intestinal parasite will smoking crystal meth make it worse?

No, probably not.

Smoking meth will make it worse. It will mess with your brain, and predispose you to multiple disorders including unwanted pregnancy. Quit doing meth while you are ahead. Incidentally, if you have not travelled outside the US, you are unlikely to have intestinal parasites. Meth is far worse than an intestinal parasite.

Not feasible to comment upon presence of an intestinal parasite, but crystal meth is a recipe for a profound health disaster and even death. Would urge you contact an expert and enter a rehab program. This is your choice but contacting us to communicate is indeed a beneficial first step.