If there was nothing unusual in the blood test concerning platelet levels, then I would recommend supplementing with at least 1000 mg vitamin C daily, as easy bruising is almost always a sign of vitamin C deficiency. If you do get the blood test results, I would be happy to look at them and see if there is anything unusual that one would not expect from a thal minor. As far as symptoms of thal minor, most doctors will tell you there are none, but this is not true at all, and I have previously posted studies about symptoms in minors.