Please take him to the doctor at the earliest.
If the cut on the head was bleeding for 4 -5 hrs, I suppose it required to be stitched upon.
With complains of numbness in his hands , nausea and disorientation
( feels weird ) the first thing to rule out is underlying head injury. Is he also complaining of weakness and numbness in the hands? Well I suppose you would also have to rule out cervical spine
Just keep notice of any worsening signs like severe headache
, altered sensorium ( drowsiness), vomiting, blurring of vision, unilateral weakness of the body or any fits.
1. Non contrast CT scan Brain with screening of cervical spine.
Take to a hospital and get a thorough clinical examination of neurological status done.
If require the ER physician might refer you to a Neurosurgeon.
How old is your son? Just check with the doctor if he is still under primary immunization
schedule or he has to be given Inj Tetanus Toxoid
(only if he is above 10 yrs).