I have gone through your query and understand your concern for Petechiae
red spots all over abdomen. Regarding your condition - it is a simple phenomenon, if your bleeding time
, clotting time and platelets are normal then there is no need to worry. SO you can go for these tests to confirm the normalcy of the blood profile in relation to that.
I suggest you to take food containing plenty of vitamin C
in your diet which maintains good strength of blood vessels.