These spots often appear as raised, red, or itchy welts. Why it happens: When your immune system reacts to a substance it ...

In addition to the itchy rash, pityriasis symptoms include ... There are many possible causes for red spots on the skin. Some are triggered by allergies, like contact dermatitis, while others ...

Some of the most common biting insects include: mosquitoes horse and deer flies fleas chiggers fire ants Often, a red mark and itching are the first telltale signs of an insect or spider bite.

Appearance: Chigger bites look like small red, raised marks that may resemble a pimple. They are extremely itchy, and the bites can sometimes appear in groups that grow bigger and itchier over ...