All products featured on Allure are independently selected by our editors. However, when you buy something through our retail links, we may earn an affiliate commission. Before COVID-19, as Yashu Dhamija describes it, when a patient presented with an itchy, painful allergic reason known as contact dermatitis, doctors had to "put on their detective hats" to identify the cause. Contact dermatitis can result from allergens in detergents, skin-care products, and more, and a doctor and patient often work together to find the irritating culprit. But mid-pandemic, when the rash appears in telltale areas of the face, it's often clear where the blame lies: