What condition can cause cherry red lips?

Cherry red lips are often indicative of carbon monoxide poisoning due to the way carbon monoxide binds with hemoglobin in the blood. This binding changes the color of the blood, leading to a bright red hue that can manifest in the lips, giving them a cherry red appearance. This is a crucial clinical sign that can help differentiate carbon monoxide poisoning from other conditions.

In cases of dehydration, lips may appear dry and cracked rather than vibrant in color. Sunburn typically causes redness of the skin but does not specifically present with cherry red lips. Lip eczema can cause irritation and redness, but again, it does not produce the distinctive cherry red coloration associated with carbon monoxide poisoning. Therefore, the presence of cherry red lips should prompt a consideration of carbon monoxide exposure as a significant medical condition.