welcome to HealthcareMagic
First thing i would like to know is your age and whether you are a male or female.The reason is if you are a female & above 40-45 years the pain will be due to Osteoarthritis
as it is seen commonly in menopausal females & is not so common in males.If you are a male then there is a chance that you may be suffering from arthritis or gout
.In either case it is advisable to get a X-ray & routine blood investigation to find out the cause & then consult a doctor to proceed with treatment.Till then to reduce pain you can take a painkiller & can start with a calcium supplement
;it will help reduce pain.