It's understandable to be concerned about your son's health after a head injury years ago.

Long-term risks after a head injury can include:

• Persistent headaches or migraines
• Cognitive difficulties such as memory or concentration problems
• Mood changes like irritability, depression, or anxiety
• Seizures or epilepsy in some cases
• Balance or coordination issues

Since your son is now experiencing headaches, it is important not to ignore this symptom. Headaches after a past head injury can sometimes indicate ongoing issues that need medical evaluation.

What you can do:

• Avoid self-medicating without professional advice.
• Keep a headache diary noting frequency, duration, intensity, and any triggers.
• Ensure he avoids activities that could risk another head injury.
• Encourage rest and hydration.

Most importantly, please consult a neurologist (a specialist doctor for brain and nervous system conditions) promptly to assess his current symptoms and determine if any further investigations or treatments are needed.

If the headaches worsen, are accompanied by other symptoms like vomiting, vision changes, weakness, or confusion, seek emergency medical care immediately.