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There are some options alternatives to surgery for symptoms of carpal tunnel syndrome. These include using anti-inflammatory medications for pain relief, use of wrist splint (specially during night and during activities which worsen the symptoms) and injection of steroids around the nerve.
You should discuss suitability of these options in your circumstances with your GP or the surgeon before you decide on one. Often, these measures do provide some relief, although it may be temporary.
The advice provided here is generic and does not take your particular circumstances into account. Please seek independent advice for your situation.