welcome to health care magic..
in general lipomas
are soft,mobile,painless tumors...
but when it gets infected,,that is when symptoms like tenderness,pain,oozing of pus material,,immediately consult surgeon and need to be excised...
this is not that much serious and i dont tell that it is not serious,,,
because of infection you may get fever
,canot do day to day activities,,it may further increases the size...
so better consult surgeon immediately..
hope you understand my suggestion
have a speed recovery