The nose of my Dad and Grandpa gradually turned "purple" as they aged into their 50's. If you look up close it's looks like little blood vessels that have become pronounced and purple.
It looks exactly like that just located basically on the nose. What causes this?
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I don't know that this answer is true but it's believed that excessive alcohol consumption can cause it in some people.
rosacea? Here are some pics to compare: http://www.rosacea.org/patients/faces.php
**Petechia** is an eruption of blood vessels. The purplish skin tone on noses are chiefly caused by the eruption of capillaries that are closer to the surface of the skin; capillaries adjoin arterioles and venules together which further widen into arteries and veins. Although the nose is a common site of petechia in more mature adults due to a lack of platelets, it can also be found on other extremities, especially in people that have vascular disease. It can be caused by simply vomiting, sneezing, crying, or it can also be cause by alcohol consumption and smoking due to vasoconstriction where the lumen of the blood vessels tighten and become smaller. It's always a good idea to check with your doctor to make sure that it is not a symptom being caused by a far more serious malignant medical problem!
Too much heat in the body. Chinese medicine would say. They need more cooling foods and not to drink alcohol.
My mom gets a blue, then purple nose if the temp drops below about 55*F. She takes only moderate alcohol. They're not sure why, but it appears to be related to vaso-constriction, as it also happens when she drinks caffeine.
A blue or purple nose is usually a very good indicator of low axygen levels in your blood stream. If your doctor is not aware of your purple nose, you should let him knoe ASAP!
It could link to chronic, life threatening conditions such as COPD. No joke, get checked out if you haven't allready.