Dermatologists Explain The Allergic Reaction Caused By A Roach Rash bejo 6909 Share Dermatologists Explain The Allergic Reaction Caused By A Roach Rash Rash Caused by Skin Allergic To Sweat, Dust and Viruses. Stock Image ... Human skin, presenting an allergic reaction, allergic rash. 9563750 ... Read also: Why Nutritional Content Of Hamburger Varies By Cooking Style