In many cases, symptoms of Bell's palsy will begin to improve in as little as two weeks and completely go away in three to six months. When people have more severe Bell's palsy - for instance, when one side of the face is completely, rather than partially, paralyzed - it may take longer to recover. Some people have facial drooping for a long time because of weakened facial muscles. Others have facial twitching because some facial nerve connections regrow improperly. Getting physical therapy can help facial muscles maintain or regain some of their strength.