George gets the photo fixed and Kramer gets into dermatology. While flipping through Kramer's medical book, Jerry learns hives can be caused by benzene, commonly used in metal cleaner. Kramer had been using Jerry's hand towel with metal cleaner to clean his slicer, and gave him hives.
George fixed the photo while Kramer specialized in dermatology. As Jerry was looking through Kramer’s medical book, he discovered that hives could be caused by benzene, a chemical commonly found in metal cleaners. Kramer had been using Jerry's hand towel with metal cleaner to clean his slicer and consequently gave Jerry hives.