This is my fourth week of taking Bystolic. Yesterday my bottom lip started to look like I was getting a fever blister, which I do get, but, very infrequently. Tonight my bottom lip is so swolen, sticking out, and feels like it is on fire unless I keep ice on it. I'm wondering if I'm having a reaction to Bystolic. I saw a physician's assistant and she does not think it is a fever blister because my entire lip is swollen. Any suggestions... other than going to doc tomorrow