Menopause defines the transition period of weakened ovary function to no function for women. During this period, because of the decrease female hormone secreted by ovary, certain symptoms might appear: hot flash, palpitation, mood swing, skin atrophy and tinnitus. These symptoms can occur when ovary function starts to decrease (around 40 years old), so it doesn’t mean symptoms only occur when menstruation is stopped (around 50 to 51 years old on average) even though it's called menopausal syndromes.