As of 2015, Mayo Clinic and WebMD both offer slideshows of common skin rashes and problems, including rashes that affect the legs. Both slideshows offer information about the rashes shown and treatment information.
Mayo Clinic’s slide show provides pictures of common rashes caused by atopic dermatitis, Christmas tree rash or pityriasis rosea, contact dermatitis, and drug interactions. Other rashes shown include intertrigo, heat rash ringworm and lichen planus.
WebMD’s slide show features pictures and information about psoriasis, razor burns, rashes caused by exposure to poison ivy, and eczema. It also provides photos of rashes caused by shingles and hives, or urticaria.