My foot was burn before 2-3 months i have some swelling now a days i am diabetic and taking lantus (insulin glargine) my diabetic level is under control what should i do?

Diabetes: If you have type 1 diabetes you should be taking more than just Lantus (insulin glargine). If you have type 2 diabetes you should start working to change your diet such that you get rid of your diabetes over time. Have a look online at "NuVal" and/or the many other options for diet control. You burnt foot needs to be seen by a foot doctor.