What are the signs of menopause? how old should you be to be menopausal? early menopause starts at what age?

Menopause starts : 1 year after last period. When perimenopausal (time leading up to menopause) you can have a # of sxs. Sxs may include waking in middle of night sweating heavily; lack of concentration, vaginal dryness; fatigue, hair loss, dizziness, brittle nails, wt gain, bloating, breast pain, headaches, itchy skin, ^ abdominal fat, incontinence, irregularity of periods, hot flashes; mood swings. Ave age=51.