I Have Been Having Random Periods Of Facial Swelling And

i have been having random periods of facial swelling and lip swelling .it can vary from mild i.e.swelling of lips to severe swelling starting in one cheek with a feeling of oressure which can then resembli the numbing tingling like having been to dentist.lips become so swollen they are painful and make drinking impossible.the swelling can then move across lips and into other cheek.usually lasts anything up to 36 hours