Shows up in different spots but same area. I can feel it before it shows. Then it swells up large for a week or two, then for another two weeks it shrinks but the center of it stays like a big pimple or cyst that doesn't pop or puss. Feels internal but not in my nostrils. Comes 2-3 times a year. It came again last week. Is there anything I can take now for the swelling till I see a dermatologist?