Yes My Husband Has Filled Fluid Sac On His Foot

Yes my husband has filled fluid sac on his foot it is connected to skin and spreading ,it does not hurt and we did go see a foot doc who referred us to to another . None of them has seen it have never seen it before . We never followed back up . That was a year ago . It seems it has spread . It does not hurt him .. If there's a doctor that know skin plz email me .