How long have you been on Tec? Have you noticed if this has coincided with anything else, e.g. start of new meds, a relapse, symptom triggers? I’m on Tec as well and I think some of the side effects listed are gastrointestinal, so just wondering if it could be related to that or a hangover of copaxone if you’ve just come off it? But overall I’d agree with @bernadette to work out triggers or patterns when you get this which’ll help you think about how to make it manageable – always worth speaking to your MS nurse about too!