HI THANK FOR TRUSTING HCM I SEE YOU CONCERN TO THIS to get daibetic as an inherited gift is very common so the sign n symptoms you are telling is all about daibetic foot with DVT one thing i must clear is that due bad control of glucouse in body due to poor blood supply and loss of sensation results in this condition before making a daignosis a diagnosis of daibetic foot you much go through these tests HbA1c color doppler for both legs RBS PP and fasting CBC rest if that black green spot has been increased i heartly says that the that green part we must removed as soon as possible as it has no role in that if affect all over the body and body gets circulating toxins so treatment part includes ampuatation of affected part rasie the leg above the body level good glycemic control by insulin or oral drugs mind it these things r very commom in daibetic patients daibetic neuropathy daibetic foot daibtic retinopathy