that over the counter meds do not work!!....i had THISproblem since i was in highschool... i always had to wear black shirts or a jacket over my colored shirt... it could be cold outside and i would still be sweating no matter what.....have your mom take you to a dermatologist and they can prescribe you the meds...
you put it on at night b4 going to bed and wash it off in the morning...
do it for 3 days and then like once a month... its works soooo well!!!... im wearing a light grey shirt right now cause i used to last night.... the stuff is called DRYSOL.... if your mom doesnt want to go to doctor tell her she can order it offline from canada, its over the counter there...website is west coast skin . com.... with out the spaces of course.... you can order it right from them and have it in a few days....IT REALLY WORKS!!!...let me know what happens!
I'm not sure what it is called but there is medication for that. I believe it is over the counter so just ask someone at your local pharmacy and they can lead you that direction. My sister went through the same problem and this medication spray finally helped. Good luck!