What is a common sign of internal bleeding?

Skin discoloration and abdominal pain are important indicators of internal bleeding. When bleeding occurs inside the body, it can lead to a collection of blood in cavities or spaces that may not be immediately visible on the surface. As blood accumulates, it can cause the skin to change color, often appearing as bruising or a pale complexion due to reduced blood volume.

Abdominal pain can manifest due to irritation of tissues and organs from the blood, or as a direct result of pressure from an accumulation of blood within the abdominal cavity. Such symptoms suggest that there is a serious underlying issue that requires immediate medical attention. Recognizing these signs can be crucial in wilderness and remote settings, where timely intervention can significantly impact the outcome for the injured person.

In contrast, the other options present symptoms that could indicate a range of conditions but are not specifically associated with internal bleeding. For instance, high fever and sweating could indicate infection, while headache and blurred vision might suggest a neurological issue, and rapid weight loss and fatigue are often symptoms of general health deterioration, not specifically linked to internal bleeding.