Numbness and tingling in the hands is something I live with permanently some days are worse then others. My numbness is the result of injuries to the neck. When the area is inflamed or the disc bulges it pushes on the nerves causing this numbness. Anytime a person goes unconscious he/she should immediately see a doctor to check for concussion. If the GP appointment is immediately then see him, if not then get to a doctor at ER. A head injury can result in tremendous complications in the future and a quick treatment might be necessary.
Daniel
yes he should go 2 the hospital i suffered a severe blow 2 head a couple of years ago & numbness 2 the hands was one of my 1st indicators that something was very wrong , your brother doesnt sound as serious but should really be checked out. good luck hope all turns out well.