Typical findings due to allergic reactions to medications or foods that affect the lips include
a. atrophic, irritated, and cracked skin at the outer corners of the mouth.
b. clusters of painful vesicles with serous fluid on the lips.
c. dry, cracked lips.
d. swollen lips.
D
Swelling of the lips is the result of allergic reactions to medications, foods, or other allergens. Cheilosis is a disorder characterized by atrophic, irritated, and cracked skin at the outer corners of the mouth which may occur from a deficiency of riboflavin in the diet, poorly fitting dentures, and deficiencies of the immune system. Clusters of painful vesicles with serous fluid on the lips are findings related to herpes simplex I virus. These lesions are commonly called cold sores or fever blisters. Chapping or superficial cracking of the lips may be due to exposure to wind, sun, or a dry environment.
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