Why hot flashes happen
As ovarian estrogen declines, the thermoregulatory zone in the hypothalamus narrows. Small changes in core temperature then trigger flushing, sweating, and sometimes chills afterward. Night sweats are the same physiology during sleep and often disrupt rest.
Symptoms can begin in perimenopause while periods are still present. Duration varies widely — many women have symptoms for several years; some longer. Severity, not just presence, guides treatment.
Evidence-based treatment
Guidelines from The Menopause Society and Canadian specialists support offering menopausal hormone therapy to healthy symptomatic women without major contraindications, ideally starting before age 60 or within about 10 years of the final menstrual period.
Non-hormonal prescription options can reduce flash frequency and intensity when HRT is declined or contraindicated. Cognitive behavioural approaches and paced breathing have modest supporting evidence. Layered clothing, cooler sleep environments, and limiting alcohol help some women but rarely replace medical therapy for severe symptoms.
When to seek care in Ontario
Seek assessment if flashes disrupt sleep, work, or quality of life; if you have risk factors that need individualized counseling (migraine with aura, clotting history, breast cancer history); or if symptoms start with atypical features that need evaluation for other causes.
HormoneFit provides physician-led virtual membership care across Ontario. In-person OHIP-insured consultations, when medically indicated, are arranged by contacting the clinic.