Breathing skin

Athleisure outfits like Yoga pants, leggings, and other tight-fitting, lycra-or-spandex pants, tights and leggings” that “look like athletic wear”  have been turning into quite the fashion statement.
 The hidden dangers of over-wearing these are:
Yeast Infections, that hold sweat closer to the skin”. This creates warmth and moisture, that leads to problems like zits, rashes, and infection.
Inflammation of hair follicles that comes from damaging or blocking the follicles’ natural growth.
Rubbing and irritation caused by tight clothes.
This also causes sweat and moisture to build up and, in turn  causes flare-ups from the growth of fungus and yeast.
Jock itch, tinea cruris usually affects men,
Fungal infection that irritates the skin of your inner thighs, butt, and genitals usually affects for women.
 Solution :- Choose moisture-wicking clothing for workouts & it should be breathable

For more info:-
http://www.healthy-holistic-living.com/yoga-pants-rash.html