This whole thread is going to be a huge waste of your time. If anything we're just going to give you tons of random possible causes and you'll end up googling them and wasting even more time.
I don't get the 'I'm too busy to see a doctor' thing. If you have time to go snowboarding and time to post on forums, you have time to stop by a doctor or at least a physio for 30 min to check it out.
I teach snowboarding via step-by-step videos lessons at
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