i hope you are talking about osteoarthritis
of either the hip or the knee joint on left side .
osteoarthritis is an age related degenerative condition which progresses with age .
medication and physiotherapy
and muscle training will work in the early phases of the disease .
if the disease is advanced you should go in for considering surgery if symptoms are persistant and each time you stop medicines the pain recurrs .
surgery provides complete pain relief .taking a lot of pain drugs for long is not good for stomach or the kidneys .
so treatment of osteoarthritis is based on
extent of symptoms .various types of surgeries are available for symptom relief based on the extent of damage and age of patient . medicines are only for short term.