Trigger A trigger is anything that sets off your symptoms. Since we are all special snowflakes, triggers are different for everyone, but stress, smoking, fatigue and infection are a few of the usual suspects. Other Terms Speech Pathologist Experts to help with speech and swallowing issues. Spinal Tap A common procedure to help diagnose MS. Tremors Shaking symptoms are often linked to MS. Trigeminal Neuralgia The feeling of acute pain in the face. View More