A single hot flash can last anywhere between 1 minute to 15 minutes!
The frequency within a day can be 0- several per hour. As you can see, there is a wide range of ‘normal.’
The same is true for how long you can look forward to dealing with them. The average is 10 yeas, but many women experience them for decades!
Fun fact: hormone replacement therapy (HRT) is scientifically proven to be the single most effective way to decrease the severity of and prevent hot flashes.