4. Nummular Dermatitis
Nummular dermatitis is one of the skin diseases that has a set of lesion characteristics. The lesions of this skin disorder have a distinctive look. The lesions will either be a round or an oval shape. They may also burn a bit or itch. These symptoms often happen when the lesions are touched. When this skin diseases first starts a person may notice that there are small areas that become blistered and red.
These spots will then join together in order to create bigger patches. When it is left untreated this skin disorder will start to look a bit like a ringworm infection. The reason for this is because there is a distinct outer border of the lesion and a center that is clear. If you notice that you have a round or oval shaped lesion on your skin and it burns or itches, it is important to have it checked by your doctor to determine the exact cause and how it will be best treated.