Itching or burning, Skin rash and Swelling. WebMD Symptom Checker helps you find the most common medical conditions indicated by the symptoms itching or burning, skin rash and swelling including Lice, Contact dermatitis, and Poison ivy, oak, and sumac. There are 44 conditions associated with itching or burning, skin rash and swelling. The links below will provide you with more detailed information on these medical conditions from the WebMD Symptom Checker and help provide a better understanding of causes and treatment of these related conditions. 1  Lice.