Do you get hot flashes before u start ur period?

Yes you can: Hot flashes are common at your age and are related to a decrease in estrogen production by your ovaries which leads to instability of the 'thermoregulatory' center of your brain. This leads to spontaneous peripheral vasodilation and the resultant 'hot flash'. At the end of your cycle, there is a drop in estrogen levels (and Progesterone levels) that leads to your cycle and can also cause these, .