What could be cause this?

My husband has a swollen lip, the swelling go up into his nose. This happen a few times a week, almost every other day. He say it hurts b/c its so big. We have no clue what it could be. It have happened at his work at home and when we are out somewhere else so that knock out something in the house, we dont conjecture its food cause it happenes b4 he eat so that takes that out. Please backingWhat could be cause this?
This is called angioedema. I largely is caused by an alllergic repercussion and can be a precusor to a serious reaction. My daughter have problems with ths for several years until we finally come to realize it was ketchup. She could drink tomatoes and marina sauce with no problem so it took us a while to integer out ketchup. Try to document what he has eat in the 24 hour interval prior to the lip swelling and you may find the source yourself. It might also be necessary to see an allergist give or take a few this.
Could it be something as simple as a lceaning solution or even the kleenix he is using? Fabric softner or laundry detergent?
Swollen lips are a adjectives allergic symptom. Get him to take some antihistamines and see if it make a difference. If the antihistamines help, consequently you've pretty much deduced that it is an allergic response, and might want to see an allergist to digit out what the allergen might be, if you can't put your finger on it. Otherwise. See your family doctor.
GO TO THE DOCTOR!!