Like the leg ulcer patients in the aforementioned study, ... Cite this: Allergic Contact Dermatitis Caused by White Petrolatum on Damaged Skin - Medscape - Dec 01, 2006.

Red, swollen skin on the leg may be caused by cellulitis, but it can also be a symptom of several other medical conditions, including stasis dermatitis, erysipelas, contact dermatitis, lymphedema ...