 The patient has what looks to be some type of allergic reaction, although the underlying cause is difficult to assess.  He will make sure he goes home to look around to see if there is in fact anything that changed recently that could have triggered this off.  In the meantime, I think he can be managed with some antihistamine over-the-counter.  He is responding already to Benadryl and the epinephrine that we gave him here.  He is told that if he develops any respiratory complaints, shortness of breath, wheezing, or tongue or lip swelling he will return immediately for evaluation.  He is discharged in stable condition.