Hi!
The cost of surgery will depend on the type of hospital you are opting for and the duration of post surgery stay. In general it can cost anywhere between one to three lakhs for an arachnoid decompression surgery. It could be more in some private hospitals and the cost can go up if there are complications. Take care!
The medical advice given should not be considered a substitute for medical care provided by a doctor who can examine you. The advice may not be completely correct for you as the doctor cannot examine you and does not know your complete medical history. Hence this reply to your post should only be considered as a guiding line and you must consult your doctor at the earliest for your medical problem.