I Woke Up With Swollen, Burning Lips On The Inside

I woke up with swollen, burning lips on the inside of my lips. I also had small white dots which burst and the appeared to crust over to heal. My doctor gave me a Corstisone shot and also a topical Cortisone cream for my mouth. The swelling has gone down but the pain is almost unbearable. I also still have a few white small dots on the inside of my lower inside lip. The left side of my throat also is huringl