Good evening, I thank you to everyone who contributed to this issue.

I have the exact same symptom of electric shock zap on the right side of my scalp. The actual spot is behind my left ear and I can feel my nerve when I touch it.

The pain is described as electric shock (I have been electrocuted a few times in my life) and always occurs after I have a fever.
The pain is excruciating as there is no fixed pattern or no fixed timeline of when the pain will occur, sometimes, once every 10 seconds, sometimes, once every minute. It starts to give a psychological damage as it drives me crazy of not knowing when the zap will occur.
The pain can be lessened by compressing the area with my hand.
In my case, the electric shock is always accompanied by a low fever.

I've been experimenting on methods to get the symptom to stop, and do feel that the pain stops as soon as the fever is gone, either by temporal tylenol or by taking Ibuprofen.

I've been given cafergot (migraine treatment) and magnesium + vitamin B and both also helps to alleviate the pain.

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As I have rad all of the replies give in this thread, I'd like to summarize a few illness which maybe the cause of the electric shock other people were having.

Below are what was shared by the people here, I would suggest everyone who had the "electric shock type of pain on scalp" to check out these keywords to see which suited your pain best:

Occipital neuralgia

trigeminal neuralgia - most described this as face pain, but worth checking

shingles

Ice Pick Headaches

peripheral neuropathy

“Scalp folliculitis”

Allodynia

postherpetic neuralgia

"Years ago my wife had similar shock like feelings in her scalp. They would last for just a short periods of time. Most doctors diagnosed this to be a mental condition. Fortunately after three months of doctoring a nutritionist diagnosed this as hypoglycemia which is a drastic swing in sugar levels in the body. Apparently this causes other organs to react abnormally and to release chemicals into the blood stream that caused the shock like feelings in the scalp. I'm not saying that your condition is a result of hypoglycemia but it may be due to a similar chemical reaction that is causing your symptoms. What my wife went through was very scary but fortunately the cure was simple………a proper diet. "

"Has anyone examined your spine for possible issues? Electric shock pains are usually nerve compressions. If you have any disc or alignment problems in your neck, or possibly arthritis, it could produce symptoms like this. I had a spine problem in my neck and have had spine surgery. Before my surgery, I had itching and pain around my scapulae, pain in my ears, and muscle spasm headaches onto the back of my head from my spine problems. You might want to consult a neurologist and have a physical therapy evaluation with a PT who is familiar with rehabbing spine surgery patients. Nerves pass through some very small spaces in the body between muscles, around joints and bones, and misalignment can compress these spaces."

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As we age, being healthy is a blessing. Do keep a good diet and exercise.