Hi Gerri
Your doctor certainly should be making some comment and a possible cause be investigated if necessary. If he thinks it's nothing to be worried about, why not say so!
The most common cause is low platelets, thrombocytopenia. Then the reasons for that might need investigating
I don't know enough medicine to comment on what needs to be done if thrombocytopenia is not present.
Blood can also seep through when there is inflammation or damage to the vessels, vasculitis of some sort. I have them on my lower legs & ankles all the time, but it's nothing to worry about as well as permanent marks and obviously damaged capillaries
I'm sorry you have to put up with this very difficult doctor
Hugs
Clare
Note
Purpura are small bruises caused by blood seeping through vessels. Very small pinpoints of blood are known as petechiae. The biggest are what we call bruises, ecchymoses I think in medicalese.
They do not go white , that is 'blanch', when pressed. You can use a glass to apply pressure so it's easier to see what happens. The more usual way is to press with your finger
http://www.netdoctor.co.uk/diseases/facts/purpura.htm
http://www.patient.co.uk/showdoc/40001183/