The correct measure to take regarding this situation would be to write a letter of commendation to his file. It is necessary to have an evidence of the situation as a first step, later the next stages of the process should be taken into account by the appropriate staff in order to respect all the time the culture of safety.
Pins and needles can have causes that aren't due to underlying disease. Examples include restricting blood flow to a part of the body, wearing tight shoes or clothes, or sitting on a toilet for too long.