May occur at the corners of the mouth; however, the infection is usually unilateral.
These lesions start as macules and, over a few days, become vesicular and then pustular, finally forming a crust and healing.[13]Scully C, Bagan J-V, Eisen D, et al, eds. Angular cheilitis. Dermatology of the lips. Oxford, UK: Isis Medical; 2000:68-73.[22]Schoenfeld RJ, Schoenfeld FI. Angular cheilitis. Cutis. 1977 Feb;19(2):213-6.
http://www.ncbi.nlm.nih.gov/pubmed/319959?tool=bestpractice.com