Increased risk of Heart attack/ Angina/ Stroke, Nerve damage, Kidney damage, Gastroparesis (Nausea/ vomiting) Diarrhea or constipation, Eye damage - blindness, Increased risk of cataract and glaucoma, Foot damage/ amputations, Skin infections, Increased risk of Alzheimer's disease/ Depression/ Hearing impairment.
Heavy exercises can increase sugar level and also risk of hypoglycemia increases in patients on insulin treatment. Patients with few Diabetic complications such as retinopathy, neuropathy may have untoward effects if vigorous activities are done.
The goal is to keep your blood sugar level as close to normal as possible to delay or prevent complications.
Treatment is either tablets or insulin to control blood sugar levels along with life style modifications (Diet + exercise).
With time, raised blood sugar can damage blood vessels in the kidneys as well as nephrons making them not work as well as they should. Many people with diabetes also develop high blood pressure, which can damage kidneys too.
Irrespective of type 1 or 2, Diabetes can be inherited and is linked to your family history and genetics but environmental factors also play a role. Not everyone with a family history of diabetes will get it, but you're more likely to develop it if a parent or sibling has it.