What does cyanosis indicate?

Cyanosis indicates a blue or grey discoloration of the skin, which is typically a sign that the body is not receiving enough oxygen. This condition arises when oxygen levels in the blood are low, leading to a change in the color of the skin, particularly in areas such as the lips, fingertips, and under the nails. Health professionals monitor for cyanosis as it can indicate serious medical issues such as respiratory or cardiovascular problems that require immediate attention. Recognizing this sign is crucial for providing appropriate care and intervention.

The other options do not relate to the primary indication of cyanosis. Loss of appetite, increased heart rate, and high blood pressure are symptoms that can occur in various medical conditions but do not specifically signify the lack of oxygen in the blood, making them unrelated to the definition of cyanosis.