My mom also have same  blood clots  and I also  have mini Blood clot on both the hand right side.... of the hand .......   have one clot and other side of the have 2 clots .... .....I have no any by birth issue it occurs after some year of my birth.........    now I become 17 Years old and that's clots continuously increasing in  size in no also.....   when I touch my hand that part I feel so hard just like a stone .. when I touch that mini clot it's just paining