Before saying about the weight loss
,one must think why there is weight gain? In your case, I think this is due to the 4 pregnancies.May be you wasn't be able to take precautions after pregnancies.This is very important because after pregnancies the uterus
should contract well.This helps the mother to live a healthy life in future.
See when the uterus doesn't contract well,the apana dushti takes place in the lower lumber region.This not only produce problems with the body but also with mind.
I must say that the ayurvedic treatment is the safest way to get rid out of this.
1)uttar basti( vaginal enema
)is the best solution,under medical supervision.
2)prataplankeshwar rasa, nityanada rasa, chitrakadi vatti, bhalattak parpati, mahapanchagavya /kalyanaka / dadimadya / panchakol ghritam; dashamoolarishta/ punarnavasavam/ amrutadya arishtam/ saraswata-arishta/ pippalyasavam are some of the renowned medicines regarding this issue.The proper diagnosis according to nadi chkitsa is must.Better you should refer to an ayurvedic vaidya for this.
There are many reasons that should be rule out first other than that of this.The description written above is based on my personal experience which gave the genuine results to my patients.
Hope this will work for you. Have a healthy life ahead.