Common triggers that can make eczema worse include: Dry skin Scratching the affected areas Viral or bacterial infections Emotional stress Chemicals in swimming pools Animals, dander, or house dust mites Allergens that you can breathe in, like pollen Some fabrics, carpets, bed linens, especially woollen or synthetic Some body products, like soaps, shampoos, moisturisers etc. Cleaning products, like surface cleaners and disinfectants Artificial colours and preservatives Fragrances, perfumes, and candles Exposure to heat, cold, or dry air