I am a 47 year old woman. I have been diagnosed with both cholesterol and diabetes for 4 years now. But both are under control with constant medication. According to my last blood reports my hba1c is 6.9 mean plasma glucose 159 fasting 125 pp is 169 hdl 45 ldl 39.5 t I am under the following medications istamet 1000 diamicron xr 500 ursokem 150 temsan 40 roseday 5 mg year ago I noticed a black circular disk on my left foot. It was swollen but now dried up. But still the black disk like thing is there. Kindly help.