Doctors Reveal the Number-1 Sign You Have Low Estrogen Levels

And what to do about it.

Jan. 31, 2026 at 5:47pm

Estrogen levels naturally decline as people age, particularly after menopause. The most common sign of low estrogen is hot flashes and night sweats, which occur when a drop in estrogen confuses the brain's thermostat and triggers rapid cooling responses like blood vessel dilation and sweating. These vasomotor symptoms can also disrupt sleep. While severity varies, doctors recommend speaking to a healthcare provider about natural and medication-based strategies to treat low estrogen and improve quality of life.

Why it matters

Estrogen is a hormone that impacts many bodily systems beyond just the reproductive system. A drop in estrogen levels can cause significant disruptions to daily life through hot flashes, night sweats, and sleep issues. Understanding the signs of low estrogen is important so people can seek appropriate treatment.

The details

Estrogen levels naturally decline as people age, particularly after menopause. The most common sign of low estrogen is hot flashes and night sweats, which occur when a drop in estrogen confuses the brain's thermostat and triggers rapid cooling responses like blood vessel dilation and sweating. These vasomotor symptoms can also disrupt sleep, with some people waking up sweating while others wake up just before a hot flash. The severity of low estrogen symptoms can vary from person to person.

  • Estrogen levels fall naturally as people get older, particularly after menopause.

The players

Brynna Connor, M.D.

A family medicine physician in Austin, TX, and the healthcare ambassador at NorthwestPharmacy.com.

Elizabeth West, M.D.

An ob/gyn with MemorialCare Medical Group in Long Beach, CA.

Got photos? Submit your photos here. ›

What they’re saying

“Most famously, low estrogen levels can cause vasomotor symptoms which are hot flashes and night sweats. These are the hallmark of menopause and a classic symptom of low estrogen.”

— Elizabeth West, M.D., ob/gyn (Prevention)

“A drop in estrogen levels confuses the hypothalamus (the brain's thermostat), making it believe the body is overheating, which triggers a rapid cooling response like blood vessel dilation.”

— Brynna Connor, M.D., family medicine physician (Prevention)

The takeaway

Understanding the signs of low estrogen, particularly hot flashes and night sweats, is important so people can seek appropriate treatment from their healthcare provider. There are natural and medication-based strategies available to help manage low estrogen levels and improve quality of life.