<s>[INST] I have the feeling of numbness in my head along with a constant headache, nausea and sudden feelings of being on fire. The heat starts from my back to my chest and head. I don t have a fever. When sitting still I get a feeling like I m on a boat. Dizzy spells and shaky hands even though I ve had a meal and I usually need to eat something sweet to stop the dizziness. [/INST] Hi, Your description of constant headache along with vertigo or constant feelings of dizziness or other movements could be interpreted as a type of headache we refer to as vertiginous migraine which can also be accompanied by nausea and dysautonomias as you are describing of feeling sudden flashes of heat, etc. On the other hand, such a headache is usually episodic and may last for a few hours then, go away, later coming back. Other things to consider would be metabolic imbalances in blood chemistry or even hormonal imbalances in the thyroid profile or other glandular systems.  A good physical examination and appropriate blood work may reveal the underlying source of your condition. Hope I have answered your query. Let me know if I can assist you further.  </s>