Your history suggests that you are suffering from severe cellulitis
and it has occurred due to uncontrolled diabets.
Unless and until your diabetes
is controlled properly by injection insulin
,your cellulitis won't get cured.
You require proper antibiotics along with meticulous control of blood sugar with injection insulin.
You must consult a diabetologist
or get admitted to the hospital for proper management of your condition.
Failure to arrest your diabetes and infection may result in spreading of infection which may be fatal even.