A TMJ flare-up is when symptoms consistent with TMJ suddenly intensify and can last for days or weeks. The most common symptoms associated with a TMJ flare-up are facial pain, migraines, and stiffness in the jaw. Flare-ups can be caused by a number of factors, including: • The misalignment of teeth • Missing a dose of medication- Medications should always be taken as prescribed to prevent flare-ups. • Foods that are difficult to chew as they are harder on the joints. • Acidic foods- These have been shown to increase the likelihood of painful flare-ups and the severity of pain experienced. Individuals who experience TMJ flare-ups should try to limit the number of acidic foods in their diet. • Caffeine- Drinks high in caffeine can cause flare-ups as it is a stimulant and can increase the likelihood of teeth grinding. • Stress- Clenching the jaw and teeth grinding at night can lead to TMJ flare-ups.