Cyanosis is characterized by bluish discoloration of skin and mucous membranes. Cyanosis is usually a sign of an underlying condition rather than being a disease in itself. The most common symptoms of ...

Peripheral cyanosis is when someone’s hands, fingertips, or feet turn blue due to a lack of oxygen-rich blood. Some causes include Raynaud’s disease, cardiovascular problems, and hypothermia. All ...

Blue fingernails may be due to a low level or lack of oxygen circulating in your red blood cells. Other causes include chronic conditions and cold temperatures. Having a blue tint to your fingernails ...

Heart attacks are caused by a lack of blood reaching the heart. Without enough blood, the heart could become seriously damaged. A heart attack could also be a symptom of coronary heart disease which ...

The symptoms of pneumonia can develop suddenly over 24 to 48 hours, may come on more slowly over several days and can affect people of any age. The colour of your skin could determine whether it is in ...

Cyanosis refers to bluish discoloration of skin, nail beds and mucous membranes. Normally haemoglobin carries most of the oxygen in blood. This oxygen carrying capacity of haemoglobin in the blood ...