I have a headache in the back of my head.
Unstable blood pressure and occipital neuralgia to consider.
Hello and welcome to "Ask a Doctor " service.
I have read your query and here is my advice.
If the pain is felt like pulsatile and in depth, high blood pressure, or unstable blood pressure may be the culprit.
If the pain seems to originate from the neck, spreads upwards and is felt in the skin, occipital neuralgia may be the condition that is causing your headaches.
In both cases, an evaluation by your Doctor is necessary in order to understand better your condition.
Discuss with your Doctor for these issues.
Hope you found the answer helpful.
Let me know if I can assist you further.