Yes My Boyfriend Smokes Crystal Meth On A Daily Basis

Yes my boyfriend smokes crystal meth on a daily basis and a bunch of it he has these boil like things on his head and on his butt. They lose out green and white liquid and they get very big hair will not even grow where the bump is. I am wondering if it is caused by Meth and also because it's on his head can it cause damage to his brain or anything else. And he is stubborn and has no insurance so he won't go to the doctor I'm asking for your help to see if there's any home remedies on how to get rid of them. And also because they're on his butt and we had sex if one that pops open having sex can that cause me to get them or cause me any problems. Can you please let me know ASAP. Thank you sincerely Jessica Simon