What condition is characterized by red sores that are contagious?

The condition characterized by red sores that are contagious is impetigo. This skin infection is caused by bacteria, typically Staphylococcus aureus or Streptococcus pyogenes. Impetigo often presents as red sores that can burst, ooze, and form a yellowish crust. It is especially common in children and can spread easily through direct contact with the sores or by sharing items such as towels or toys.

In contrast, eczema and psoriasis are chronic skin conditions, primarily associated with inflammation and are not contagious. Eczema often appears as dry, itchy patches, while psoriasis is characterized by thick, scaly plaques. Herpes simplex, while contagious and presenting with sores, is mainly known for its clusters of blisters rather than red sores that burst and crust over, which are typical of impetigo. Thus, impetigo is distinctly recognized for its contagious nature and the appearance of red sores, making it the correct choice.