For women, overly tight pants or jeans can lead to fungal infections like Thrush. Experts have also warned against wearing control underwear in a size too small saying they can cause acid reflux and heartburn, as well as making you need the toilet more. One of the reasons that womens yoga pants are so popular is because they are the ultimate comfort pants. They don't have stubborn buttons or zippers to mess with. They are made of stretchy, ultra-forgiving fabric that moves with you. Him Yoga