<s>[INST] I have a canker sore accompanied by sore/stiff neck, right side tooth sensitivity, numbness and weird taste in mouth also have headaches off and on.  Feeling like Im tripping over my words when I talk as well. I feel very fatigued and my vision is a little altered [/INST] Hello and welcome. Thanks for sharing your concern. According to symptoms mentioned here it requires a dental visit for clinical examination of tooth sensitivity. Secondly please take analgesics and anti-inflammatory medicine like Coquitlam for immediate relief. Also do warm saline rinse until you see your physician regarding stiff neck. Your physician might prescribe you with muscle relaxant for stiff neck after examining the exact cause. Hope it helps. Thanks. Take care. </s>