I ordered home collection for blood sample ,as procedure was smooth n no bleed also after procedure n phlebotomist applied handiplast . Next day when handiplast was removed , superficial clot was seen over cubital fossa region . No pain n no swelling  no warmth over tat region, absolutely fine , just discoloration or clot is seen . Is this normal or I should be concerned about some clotting disorder (I have long standing varicose veins). What's the treatment for this? Planning to take covid vaccination ,plz suggest .