However, stress is not the only cause for facial redness or rashes. They can range in size from tiny dots to large welts and may itch or burn. Hives can also appear on the neck, chest, and arms. In fact, it’s one of the environmental factors that can cause red patches on your face. Yes, stress can cause facial rashes, more commonly known as hives. We’ll break each of these categories down, as well as discuss treatment options for red patches on your face. While there are many reasons for red patches on your face to appear, all of these reasons can be summed up into three categories: allergens and irritants, environmental factors, and health conditions. Warts Treatment and Molluscum Contagiosum.