I'm sorry to hear about the ongoing pain you're experiencing from your head injury. Persistent pain at the site of a previous head trauma, especially with sharp, intermittent sensations like pins being inserted, can be concerning and may indicate nerve involvement or other complications.

Here are some important points to consider:

• Possible Causes: The pain could be related to nerve irritation or damage from the original injury, scar tissue, or other underlying issues such as a delayed complication.
• Urgency: Since the pain is severe and recurring frequently, it is important to have a thorough evaluation to rule out any serious conditions.
• Next Steps: I strongly recommend consulting a neurologist (a specialist in nervous system disorders) who can perform a detailed examination and may suggest imaging studies like an MRI or CT scan to assess the area.
• Pain Management: Avoid self-medicating without professional advice. Medications like Naproxen (an analgesic) can help with pain but should only be taken under medical supervision, especially considering your history.

If you experience additional symptoms such as weakness, vision changes, confusion, or worsening headaches, seek emergency medical care immediately.

Please make an appointment with a neurologist as soon as possible to get a proper diagnosis and appropriate treatment. Your health and safety are paramount.To narrow down potential causes, we will need some more information.I understand you're dealing with head pain from a past injury. Could you please share your age and gender so I can better understand your situation?