This is venous stasis dermatitis. This condition occurs when the blood that builds up in the damaged blood vessels begins to leak out of the blood vessels.
various treatment modalities are available that include Topical corticosteroids, ligation of the vessels, Combination therapy with autologous platelet-rich plasma and light-emitting diodes Compression stockings, nonsteroidal calcineurin inhibitors tacrolimus and pimecrolimus
Hi
this looks like a case of Dermatitis/neglecta or Medicamentosa where people dont wash their rashes and keep on applying locally available remedies and medicines. please explore more from his history.