After a long flight I got red blotches on the lower part of my legs. They do not hurt or itch. In fact, I did not know they were there until someone pointed them out to me. A few days after my trip they slowly went away. Last month I took a trip and did a lot of walking and the red dots appeared again. They have gone away. I have a trip planned to Scotland next month so I would like to know what to do to avoid these red dots/blotches on my flight.