Hi Thanks for the query.  I completely understand your concern and I hope I am able to help you for the same.  Looks like you have developed cellulitis over the lip.  We can try conservative treatment first but if the condition continues to worsen , then you might need to consult a physician.  Avoid touching it too much.  Avoid using any kind of cold dreams or oils, as it might increase the lesion  You can start using any topical antibiotic/antiseptic cream(like mupirocin cream) over the lesion for 2-3 days  Take some pain killers along for relieving the associated pain and discomfort . Oral antibiotics are required if the cellulitis increases, which a dermatologist / physician can examine and suggest . Take care. Wishing you speedy recovery , Dr Geetika Paul