This could end in diabetic foot,if not treated correctly. First of get investigated his blood glucose level. Consult expert in
Diabetes mellitus, first, to have one opinion.
Next Steps
Concentrate on his diet, and follow all aseptic precautions. It should not end in gangrenous stage.
Health Tips
After consulting Expert in Diabetic you can continue with Homoeopathic treatment for your Father. Can contact at nine nine six zero two zero five eight two one