Red fingertips and purple nails

Symptoms Physical
#1

My sister made a comment the other day, and i was surprised i had never realized this. She said: “wow, why do your nails look purple like this? You could be having some kind of circulation problem.” I replied that the tips of my fingers look red (normal color for me) but still she kept saying this is not normal.
Well, searching the web today i found this:
“It’s an indication of poor circulation. You really need to see a doctor about this right away. Bluish / purplish indicates cyanosis…”

Then, searching the causes of Peripheral cyanosis i found this:

“One of the possible causes is Vasoconstriction. Vasoconstriction is mostly the result of increased intracellular concentration of calcium (Ca2+ions).”
And it gets worse:
“Vasoconstriction is a procedure of the body that avoids orthostatic hypotension. It is a part of a body negative feed back loop in which the body tries to restore homeostasis” “VASOCONSTRICTION CAN BE A CONTRIBUTING FACTOR TO ERECTILE DYSFUNCTION.”

#2

Based on this symptom would it be safe to use a medication like Levitra or Viagra?

I started then to realize this: If my body is trying to avoid orthostatic hypotension, by contracting the vessels, how can it be safe to use a medication that will do just the opposite and cause vasodilation?

As we all learned the hardest way, every medication has effects on you entire body. So, based on this i decided not to take Levitra anymore, or any ED drug. Regarding ED, my problem is mantaining an erection when standing. I am able to keep it erect if i am laying down.