Blood work like CBC,ESR,Lipid panel,Renal function test,Blood sugar,HbA1c.
She needs ultrasound studies of her lower extremities-dopplers of arterial and venous flow as this might be due to very poor circulation.
An Xray of the foot-toe specifically to rule out osteo. This will likely be non diagnostic so a bone scan or CT of the foot would tell.
An ESR might add weight to the osteo diagnosis if it is very high.
Wound care should be done
In case of infection, broad spectrum antibiotics can be given.
IV fluids can be given as well.
In case of high blood sugar levels,short acting insulin can be advised.
Tetanus toxoid shot should be updated(if the patient has not given shot since last 5 years) to prevent any further complications.
A consult with podiatry or with Orthopedics should be ordered if osteo is confirmed as surgery might be indicated.
Hope this helps.
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