Other than normal platelets, there are a wide host of bleeding disorders to consider. This can include deficiencies in the various clotting factors or platelet function to name a few. The presence of Motrin certainly does not help and I would consider stopping this medication if the bruising continues.
General screening tests include the platelet count, bleeding time, prothrombin time (PT), activated partial thromboplastin time (aPTT), and thrombin time (TT).
Specific tests include examination of the peripheral blood smear, platelet aggregation in response to ADP, epinephrine, collagen and ristocetin; platelet release assays, coagulation factor assays, and assessment of the clot solubility in urea. Tests of fibrinolysis include the measurement of fibrin split product and D-dimer levels.
I would discuss whether these tests are reasonable in your case. A referral to a hematologist may be considered.
Followup with your personal physician is essential.
This answer is not intended as and does not substitute for medical advice - the information presented is for patient education only. Please see your personal physician for further evaluation of your individual case.
Thanks,
Kevin, M.D.
Drews. Approach to the patient with a bleeding diathesis. UptoDate, 2004.