They can be very different from person to person. It is estimated that 90% of all head trauma sufferers have no sequelae of their CD. 5 to 8% present significant sequelae and for 1%, the sequelae are severe with the possibility of a persistent coma.

Among the consequences, we can find:

• Chronic headaches
• Dizziness
• Confusional Syndrome
• A epilepsy, always possible, regardless of the intensity of the head trauma (mild, moderate or severe). It manifests itself in 3% of all head trauma patients.
• In the longer term, a risk of meningitis exists if the head trauma was accompanied by an externalized flow of cerebrospinal fluid, especially in the bones of the face (nose, ears, etc.).
• A paralysis, more or less extensive, which depends on the location of the brain lesion.
• benefits abscess cerebral, which can occur when a foreign body penetrates the brain, when bone debris is present or quite simply when the CT is accompanied by a fracture of the skull with depression.
• Various neuro-sensory damage (loss of hearing or smell, reduced tolerance to certain stimuli (noise))
• A deterioration of intellectual and psychic functions
• A loss of balance
• Speech difficulties
• Increased fatigue
• Memorization, concentration, comprehension difficulties …
• Apathy or on the contrary irritability, impulsiveness, disinhibition, mood disorders …

The sequelae may justify hospitalization in a rehabilitation center for brain-injured patients.