Having head pressure everyday at the back of my head which feel blood circulation shortage, had mra/mri of head/neck. Both negative. Lightheaded?

Chronicity. The prior term, chronic daily headaches, now migraines, may well be applied to your pattern. My thoughts, assuming you have no jaw, neck, dental, or sinus triggers, would be to place you on a trial of an anti migraine agent, and would opt for an OTC prep such as riboflavin, CoQ-10, butterbur, feverfew, magnesium. Hope this helps.
Muscle spasm. Now that bad things have been ruled out, time to have exam for superior trapezius muscle spasm and possible therapeutic occipital block. See an osteopath or physiatrist for diagnosis and therapeutic advisory. Massage, acupuncture, muscle relaxants, and biofeedback are some of the approaches to healing.

Related Questions

Having head pressure, throbbing, pain, lightheaded, fatigue for 4months? Had head/neck mri, mra and CT scan, blood work. What next? No meds help.

It could be one. Of those obscure diseases that cause fatigue, such as lyme disease, chronic fatigue syndrome, fibromyalgia, etc. I assume all common medical conditions have been excluded with all of your tests. Consult a pain management specialist for your headaches. Read more...
See a neurologist. These symptoms may represent a headache or other neurological condition. You should keep a log of the location, timing, duration, and intensity of these episodes and take the log with you to a neurologist. https://www.aan.com/Guidelines/Home/ByTopic?topicId=16. Read more...

Head has lots of pressure & shooting sharp pains n it mra & CT & MRI all normal neck pain & lightheaded very stressed out lately?

Neck muscles . Tight neck muscles can irritate the nerves going to the head/scalp and cause headaches. Check with your physician for evaluation. Referral to a physical medicine specialist might be needed. Read more...