Interestingly, the results show that hot flashes often start earlier than previously thought and persist for longer. The effect of hot flashes on the ability of blood vessels to dilate was documented only in the younger women in the sample. In older women, no such association was observed indicating indicating that early occurring hot flashes may be those most relevant to heart disease risk.
Certain things like stress, alcohol, spicy food and smoking may trigger hot flashes and make it even worse. You can't really avoid hot flashes if they occur but you can certainly deal with the situation by staying cool, deep breathing can help and so can having light meals. According to Macrobiotic Nutritionist Shilpa Arora, foods rich in phytoestrogen like soy, broccoli, cabbage and herbs like shatavri and maca can help in easing the symptoms of menopause.