Heart discomfort toenail blackening may be caused by heart disease or lung disease resulting in tissue ischemia and hypoxia.
1. Heart disease: heart disease such as heart failure, the heart pumping dysfunction, resulting in peripheral circulation of blood is insufficient, the organization can not get enough oxygen, blood and energy. The peripheral circulation of the toenail is weakened, and the toenail becomes woozy.
2. Lung disease: lung disease such as chronic obstructive pulmonary disease, lung ventilation and ventilation dysfunction, the blood red oxygenated hemoglobin decrease, blue reduced hemoglobin increase, so that the arterial blood color darkened black, so toenails become black.
3. Lack of oxygen will also affect the blood supply and oxygenation of the heart muscle, resulting in symptoms of heart discomfort.
When the heart is not comfortable toenail black, it is recommended to go to the hospital in time, clear cause and symptomatic treatment.