what i learn from old people that fungal infection can be worse because of diabetes. fungal are being fed by excess glucose in our blood.
our body can develop their own antibody against those fungal, but it cant make quickly enough if those fungal growth uncontrollably. there is where anti fungal treatment is needed.

I had foot fungus previously. Wash with sulphur shampoo and some mild vinegar mixed with water. Kills the fungus.

whatever it is, control blood sugar come first.
mana la tau you got undiagnosed diabetes.

How do you know it's confirmed fungus? if unker google say so, go to pharmacy ask them to rekomen which topical medication first.
cannot resolve, then only see specialist.

they dint take sample and make lab test?

Owh I thought yours is external. You mean got fungus in your face?