At the age of 49, the following symptoms may occur before menopause: 1) changes in menstruation, which may include prolonged menstruation, disrupted menstrual cycles, or increased menstruation and decreased menstruation, which are symptoms of menstruation; 2) hot flashes, excessive sweating, or insomnia; 3) emotional changes that are sensitive, suspicious, and easily agitated; 4) decreased libido, as the body’s hormone levels are decreasing; 5) decreased work capacity. 4. decreased libido, because the hormone level in the body is decreasing, so the libido will also decrease; 5. clinically, there will also be symptoms of reduced work capacity. So these are the corresponding symptoms that appear before menopause, and the degree of symptoms varies due to individual differences.