severe head pressure - feels like head is being squeezed in a vice

[heapsreal]

That sounds alot like what I had. Read my post above may help. Chronic Intracranial hypertension???

Can feel absolutely exhausted and head throbbing in pain especially in the afternoon and like you mentioned, lay down for 15-20mins, not sleeping just resting and there's a significant improvement. I think it's the build up of csf fluid can drain out when lying down and reduce the pain and pressure.

 

[chasingmytail]

May be worth getting the neck and spine checked. Without an MRI/xray of this area nothing can be ruled out. Another thing I have learnt over the last year is the poor muscle control in the neck and shoulders. I have started building on this area with lots of stretching & swimming. TMJ obv. Hypertension another. Chari malfunction. Some cracking youtube vids on self treatment.