Webmd symptom checker helps you find the most common medical conditions indicated by the symptoms itching or burning, skin redness and swelling including allergic reaction, lice, and poison ivy, oak, and sumac. There are 27 conditions associated with itching or burning, skin redness and swelling. Anal itching is the irritation of the skin at the exit of the rectum, known as the anus, accompanied by the desire to scratch. Causes include everything from irritating foods we eat, to certain diseases, and infections. Treatment options include over-the-counter medications, using moist pads, and gentle cleaning and drying of the anus. Rectal pain is a common health condition we may try our best to ignore, but one that can lead to serious illnesses ranging from rectal abscesses to anal cancer. Lesions or growths in and around the anus can cause rectal pain. Two of the most common anal lesions are genital warts and herpes simplex. Its also common about 20 percent of pregnant women have itchy skin. You may feel especially itchy around your belly and breasts as your skin stretches to accommodate their increased size.