Waking up between 1-3 AM with a wet pillow, wet blankets, and wet hair due to sweating and hot flushes? 60-80% of women who are perimenopausal and menopausal will experience hot flushes and nightsweats. Why do some women get nightsweats? Nightsweats due to peri-menopause and menopause are related to decreasing estrogen levels, namely estradiol, (there are 3 types of estrogen: estradiol, estriol, and estrone). Estradiol is the estrogen that helps with secondary sex characteris