Why do i get a warm pressure in my head (general brain and behind eyes) with a lump feeling in my throat usually when i'm hungry or dehydrated?

Could be your body: is preparing to wanting to direct your circulation to getting ready to eat? Look to see where your warmth feeling goes after eating? It may be toward your stomach area, where digestion is taking place. Could also be as you are dehydrated, your body is giving you signal that it's time to drink liquids to hydrate, and quench your thirst, that may appear to you as a lump in your throat.

Reactions: Your body may react in these manners to fluctuations in blood sugar and hydration. Different reactions are seen in different people.

Psychological?: Please check with your physician. Possible migraine. Also make sure you are not anemic (low blood count) or have iron deficiency

See your doctor: Dehydration can definitely cause those symptoms. There are many other possibilities, however. See your doctor, who can examine you and order tests if needed. Hope this helps!

Low blood sugar: and dehydration type headache. Try to keep a healthy approach to your life and lifestyle. Maintain regular diet and drink atleast 8 glasses of water daily, more if you exercise. Take care

Good question: No easy answer. Stay well hydrated. Eat three healthy meals a day including breakfast. Get lots of sleep. See your doctor to get a good physical done. Hopefully this will go away. Sounds like its causing you some anxiety.