Premenopause can start anytime from the age of 37 or so, usually it starts around 40s.
Read this blog on Premenopause
I believe that working on symptoms of Premenopause can help prevent disease later in life. Early heart attacks in women are linked to premenopause and menopause.
Try the Daily Program
Often associated with Chronic pain – Hormonal stress causes inflammation which can lead to chronic pain and irritable bladder and irritable bowel and heartburn or GERD
check out Step 3 which talks about Fascia which often is inflammed in times of hormonal or other stress. Step 3 and Fascia
The work is worth it