Bumps on your skin can have a variety of causes, from allergic reactions to acne. However, you can tell the differences between an allergic reaction and other bumps on your face by some defining ...

Essential oils are currently the “cool kids” of the wellness scene, touted for health benefits ranging from relieving anxiety, fighting infections, easing headaches, and more. But if used improperly, ...

Transfusion reactions are medical complications that arise after a blood transfusion. They may occur during the transfusion (known as acute) or weeks after it (delayed). They're further classified ...

A hypersensitivity reaction happens when the immune system mistakenly identifies harmless substances as harmful. There are several types of hypersensitivity reactions, depending on the class of ...

Drug reaction with eosinophilia and systemic symptoms (DRESS) is a T-cell–mediated severe cutaneous adverse reaction characterized by rash, fever, internal organ involvement, and systemic ...

The earliest description of an incompatible hemolytic transfusion reaction dates to the experimental start of transfusion therapy in the mid-17th century. While treating a nobleman who had episodes of ...