I masturbate 2-3 times a day n i m feeling tremors in my hands especially under stress.can they b related, i also take salbutamol for my asthma ..help?

Not related: You're enjoying your body like most of your peers and this won't cause health problem. Salbutamol is famous for causing tremors like what you describe; maybe 10% of folks get this. Ask your physician whether there's some other rx you could try, and also whether you might have familial tremor which often shows up at your age (did mom / dad have the shakes like you?).