Thanks for your query.
Though it was just a lacerated wound of the scalp skin, concussion
of the brain cannot be ruled out. In concussion, symptoms of headache, confusion, foggy brain and excessive sleep can occur, after an interval of few days following head injury
. But these problems go away after a while (few days or, in some cases, few weeks).
You may however, get an MRI of the brain done to exclude any bleeding or structural damage to the brain.
On the other hand, your problems can also be due to other conditions- not associated with head injury- such as, thyroid
problem, mental stress/depression
It would be worthwhile if you get Thyroid hormonal
profile done too.
Consult your treating doctor if you have mental stress/depression. He will evaluate and examine you; order for relevant tests if required; and, prescribe appropriate drugs.
Hope I have answered your query.
Dr. Rakesh Karanwal