What can cause rapid heart rate (up to 174 bpm), severe headache, rapid breathing, adrenaline rush to occur multiple times a night every night.

See your Doctor. All these symptoms are a warning that are telling you to be seen, when we lie down fluid changes in our system can trigger underlying heart disease and trigger some of your symptoms, and could also be an endocrine (gland and hormone) problem, so please get to your Doctor and get this evaluated right away!

Related Questions

20 years old. Chest pain, especially when lying down. Pale, sweaty, lightheaded. Severe headache. Rapid heart rate that jumps around.?

Scary. All symptoms point to a the fact that you are having some type of tachy-arrhythmia (fast abnormal heat rhythm). Given what you're describing, your body is not tolerating it very well so I suggest a trip to the closest ER or Urgent care center and would have another person drive or call 911. Read more...
Fever? You are really sick. Either you have the flu, or something else is wrong. You need an evaluation in an ER. Call EMS or have someone drive you. This is not something that can be fixed through a computer, you need an exam. Read more...

I have pots and sometimes when I experience a fast heart rate, I get an instant intense buzzing all over even if I keep my breathing very slow. Due to fast hr, adrenaline, or a different cause?

Check out these. Links. I presume your dr has checked u for thyroid disorder and arrythmias. Take care and god bless u! http://www.Ninds.Nih.Gov/disorders/postural_tachycardia_syndrome/postural_tachycardia_syndrome.Htm. Read more...
Possibly related. Patients with postural tachycardia syndrome (pots) report dizziness, lightheadedness, weakness, blurred vision, and fatigue upon standing. Read more...