This is most likely bell’s palsy from
the description. If someone has Bell’s palsy,
the muscles
in their face become temporarily paralyzed. It usually affects just one side of the face. Symptoms appear suddenly one cannot shut eyes and their mouth droops. These are worst about 48 hours after starting. Scientists postulate this as a viral infection, which is making the facial nerve swell, or inflamed. it is more common in diabetics, people sick with cold or flu and pregnant ladies.