Dermatology Questions? Ask an Online Dermatologist.
Do you have any other symptoms such as fever, fatigue, weight loss, easy infection, swollen lymph nodes, recurrent nosebleeds, night sweat, bone pain or tenderness? Any medical problem? Any surgeries? Any medications including over-the-counter pills and herbs? Any family medical history?
You don't need to worry about leukemia.Reassured.
They are not petchiae. On the leg, they seem to be bruises.
They doesn't seem to be veins. If they are veins, they come out when you tie the upper arm with an elastic band.
Brushing can be caused by normal situation. It can be caused by other disorders such as low platelet, weak blood vessels, low blood clot factors. But your bruise is not so significantly abnormal. You don't need to worry.