After my head injury I have cold sensations internally

there are meny diferint tipes of head injures. the most comon head injury is a cuncushon.

There are many symptoms and criteria for a head injury. You can get some serious damage to the brain. Brain injuries are the most common injury to the head.

either as a closed head injury, such as the head hitting a car's windshield, or as a penetrating head injury, as when a bullet pierces the skull.

Yes, any injury to the head can cause ongoing headaches.