Sunscreen use?: If only your lips are swollen, there are two possibilities: 1. Your lips are sunburned if you did not use sunblocker on them (lips have no melanin, so they never tan, just burn). 2. If you did use some product on your lips, you may be reacting to that. Always wear lip balms with high SPF in the sun to avoid sunburning and re-apply hourly or more: this will also help prevent fever blisters, too
Answered 5/28/2018
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