I have SMM since 2017 and prior MGUS in 2014. I see a MM specialist at OHSU every 3 months with labs. My platelets and white blood cells are normal but for the last 6 months my arms have purpura rash. Any bump or scratch turns into long lasting purpura. Both my arms are pretty much covered in it 24/7. I am 53yrs old but my arms look like I'm 90. Anyone else with good platelet counts have this?