On the shins, a slight depression in the skin can be formed that is either the shape of a spot or a line; this is diabetic dermopathy.
You do not need to wait for signs of high blood sugar to appear on the skin before booking a doctor’s appointment.
By the time symptoms do appear on the skin, you probably have had unmanaged diabetes for a while.
Before manifestations develop on the skin, there are other signs of high blood sugar.