 [ Symptoms ] can excessive sweating cause a yeast infection  i have started working out on a treadmill and wearing under armour pants that i was wearing while running outside could the excessive sweat cause a yeast infection i am 54 years old and have only had 2 others in my life they were both due to reactions of being on antibiotics [ Disease ] yeast is inside your intestines its the stuff thathelps break down our food but it is possible that sweating has cause some yeast to enter your vag area i would say drink plenty of water to help it flush out and try to keep yourself extra clean to avoid it repeating <positive_smiley>