Symptoms of high blood sugar include weight loss, frequent urination, increased thirst and high levels of sugar in the urine. Although this condition rarely causes noticeable symptoms, its severity increases with time if not treated, according to Healthline.
High blood sugar, also called hyperglycemia, interferes with how the body processes sugar and is common in diabetics. The recommended range of blood sugar levels in the body is between 200 to 350 milligrams per decimeter in adults and between 200 to 240 milligrams per decimeter in children. If the blood sugar level of a patient is constantly higher than these figures, he may experience symptoms such as urinating more than normal, unexpected weight loss and increased appetite. The patient should drink enough liquid to replace the fluids lost from the body and to prevent symptoms of dehydration, such as dry mouth, dry skin and increased thirst, explains WebMD.
In severe cases, the patient may have symptoms such as blurred vision, light-headedness and difficulty waking up. Diabetics who have hyperglycemia may also experience deep breathing, a fast heart rate, belly pains and fruity breath odors, notes WebMD.
Common causes of high blood sugar include stress, eating more carbohydrates than normal, being less active and skipping insulin injections in diabetics, says Healthline.