I woke up an hour ago with an itchy stinging feeling below my bottom lip. I looked in the mirror and saw a whitish area about 5cm in diameter. The top part of it was on my bottom lip. It was very itchy, hot, and numb. It was growing, becoming 10cm in a few minutes. I applied some desonide (topical steroid) because I thought I was having an allergic reaction to a bite. The bump stopped growing and the itching subsided somewhat. But the numbness is still there, and growing. Now my entire bottom lip is numb. I couldn't find a bug around the bed. What could it be?