There are many conditions to consider when red spots appear on the skin. If these spots are caused by allergic factors and are accompanied by some itching, they may be the result of allergic dermatitis or eczema. If the patient also has a fever, or if the red spots appear after a fever, it could be a viral rash, such as measles, rubella, or other viral rashes, or it could be a rash caused by a bacterial infection, such as scarlet fever, which can also appear as red spots. Of course, in addition to infectious factors may also be allergic purpura, allergic purpura will also appear red spots, but with the hand pressed usually will not fade.