Nitrates widen blood vessels, and Viagra increases that effect. Mixing the two can cause your blood pressure to drop drastically. A sudden drop in blood pressure can make you pass out, and you may die if your blood pressure stays too low for too long.
3 doctors agreed: 1  Allergic dhiners: She has what's known as allergic shiners. It it caused by blood shimmering through her fine skin. 2  Cold compress: Purple or blue marks under eyes may be due to blood vessels under eyes. Cold ice packs might help marks decrease by contracting the vessels. What causes : rapid appearance of brown spots on nose, under eyes, forehead. Feet cold and turn purple, sore breasts, acid reflux, popping joints? Dr. Jan Lei Iwata Dr. Iwata
What is cyanosis? Cyanosis is a bluish color in the skin, lips and nail beds caused by a shortage of oxygen in the blood. Cyanosis occurs because blood with decreased oxygen turns blue or purple. This low-oxygen blood causes a blue-purple tint to the skin. What conditions cause cyanosis? Cyanosis is usually caused by problems of the heart, lungs or blood. Some of the defects or diseases that can cause a child to have cyanosis are: 1  truncus arteriosus. 2  total anomalous pulmonary venous return. 3  transposition of the great arteries. 4  tricuspid atresia. 5  pulmonary atresia. 6  atrioventricular canal defect. 7  pulmonary hypertension. 8  hypoplastic left heart syndrome.