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Hello C, Sorry about this minor defect that is due to overgrown capillaries (and not underdeveloped ones) with more blood flowing through them causing hot feeling and swelling.
This malformation will not cause any problem now or later, except perhaps more bleeding due to cut or injury there.
Nail growth would also be erratic due to underlying defect. You could later in childhood consult a vascular surgeon and get usg examination (digital substraction angiography) to better understand the defect and plan for definitive treatment.