try regular exercise... laugh if you want.. my wife didn't believe me.. after exercise regularly she doesn't suffer from cramps and tiredness so much.. but she wasn't a believer so stop exercise.. the prob came back...  so now she believe me This Blogger claim yoga helped to banish away the pain... 

everybody wants to take easy way out take this pill and that pill... but is it healthy in the long run.... anyway exercise got so much benefit also.. try it first ler.. don't cost you anything ..