Timing your own episodes against a trusted reference
Time a few of your own episodes and compare them with a trusted reference, such as the hospital page below. Check whether the reference means a single hot flash or how long they keep coming over months or years, then ask a clinician what to expect for you.
Single episode versus years of hot flashes
Two different things get called duration. One is how long a single hot flash lasts. The other is how long you will keep having them over months or years. Sources often answer only one of the two, so check which one a page means before you rely on it.
A hospital system's page on hot flashes addresses how long they last, and a menopause society's hot flash page offers a patient-focused view. For treatment context, read the federal consumer guide to menopause medicines and the federal summary of black cohosh.
A few weeks of records, then a cost conversation
Keep a simple record for a few weeks, including the time of day and how long each episode felt. Bring it to a clinician and ask what to expect for your situation, what treatment would cost and how often follow-up is needed.
When a hot flash needs medical help promptly
If an episode comes with chest pain, fainting or another alarming symptom, get medical help promptly. Tracking your episodes and asking what follow-up costs gives a clinician what they need to judge your case, and only they can say what to expect for you.