For the past few months i have been experiencing intermittent swellings on my skin in random places on my back or my lips. I am not sure as to the cause but instinctively feel that they might be an allergy to something that touches my skin or maybe something i eat. The lip swellings are always in the morning and usually wear off by midday, but the back swellings only happen in the middle or end of the day and are usually gone by morning. Any ideas? I know i am allergic to coffee and green peppers and so i always avoid them!