section_path: Signs and symptoms/Skin
section_name: Skin
paragraph_text: Skin
  
  Substances that come into contact with the skin, such as latex, are also common causes of allergic reactions, known as contact dermatitis or eczema. Skin allergies frequently cause rashes, or swelling and inflammation within the skin, in what is known as a " weal and flare" reaction characteristic of hives and angioedema.
  
  With insect stings, a large local reaction may occur in the form of an area of skin redness greater than 10 cm in size that can last one to two days. This reaction may also occur after immunotherapy.