hello, as per ur symptoms u seem to be suffering from bleeding disorder
.. may be ur blood platelets are involved.. for correct diagnosis u are required to undergo blood test
-complete blood examination CBC.. including PT,BT,differential and total leukocyte count,Hb,INR,CT,and kidney n liver function tests.,.Random Blood Sugar
bruises u r describing are capillary bleeding which can occur in excess if any of blood component is increased in count and if any of blood coagulating factor is decreased..
as per the lab reports the action can be taken..
it is blood related disorder.. and u shouldnot neglect it..
is also a sign of diabetes
and if all ur reports are normal.. nothing to be worried about.. It can be pure allergic/traumatic in origin to some scratch by ur nails unknowingly on skin .. and keep ur follow up visits to dentist
regularly for gum maintainenece.