It could be some sort of neuralgia. I have occipital neuralgia and it feels like pins and needs all up the back of my head into the top. It's caused by tight muscles in your neck irritating your occipital nerves which cause pain up your head. If this is your problem, ask your doctor about nerve block injections. They helped me. Do you have neck pain? If so do you see a PT ? They can give you stretches and work out the kinks that will help too.