Trauma and physical injury can both result in numbing sensations, short to medium term.
Sometimes after being punched the numbness is connected to damage to the trigeminal nerve which is connected to the brain stem.
Hopefully you will only have short term damage.
Your partner needs to take control of that temper of his and stop using his fists on you.
With every incident where he gets violent or drunk and aggressive, he is risking inflicting a very serious injury on you.
The risks are even higher considering your weight and all the other health issues which may make you more vulnerable to pain or adversely impact upon your ability to recover from injuries.
Every act of violence also risks earning him a criminal record, ruining his own career, wrecking his personal reputation and ending up with him coming to the attention of the police or local authorities as a violent domestic abuser.
He must know all this.
Remind him how grave the consequences of violent fighting have been for other high achieving professional men in britain & usa after they got angry or very drunk, abandoned all self-restraint and allowed their fists to do the talking.
The violence has to stop now.
Before someone ends up in a prison cell, permanently crippled, on life support or in the morgue.