look into PANDAS. My son has same problem and a host of others and is currently being evaluated for this disorder. http://www.nimh.nih.gov/health/publications/pandas/index.shtml
Could be a sensory issue. Could be an anxiety issue. And I suppose, it could be something else. Try googling terms as "sensory integration" or "DIS" or child sensitivities" or similar phrases to better understand sensory issues. Then, try googling terms as "childhood anxiety" or "anxiety symptoms" or similar phrases to better understand anxiety issues. Once you know the "cause" of his behaviours, then you should be able to begin the process to seek treatment. By the way, your child could suffer from both sensory and anxiety issues. If you get no results from your search of the internet, then book an appointment with his family doctor. The teen years are a good time to see if the doctor (especially if no visit has been scheduled for some time. Hope this helps ...