It Just Started Last Night I Ate A Hot Dog

It just started last night I ate a hot dog and I felt a tightness in my jaw back by my ear it swelled up to the point I could hardly open my mouth, it didn't hurt, it went away in about 30 minutes after eating, Then today while eating breakfast same thing happen, and tonight. its back where the jaw bones are hinged, it goes down in about and hour very little pain.