I am suffering from cramps in feet and slight swelling in the right leg for 2 years. I started with vit. B1, b3, b5 & neurobion forte since 4 months. This has given 70 per cent relief. How long should I continue? Now a month back I started getting neck pain. I exercise my neck by moving my head from right to left & up and down there is no pain. Anytime during the day when I look up and bring my head down, there is slight pain with a clicking sound.