Doctors warn against using common physical signs to diagnose high blood sugar

Health educator Glucosegurlrami recently highlighted five signs she called silent indicators of high sugar levels: poor sleep, excessive thirst, heavy urination, strong cravings, skin itching, and body aches or nerve pain. Dr Himika Chawla, a senior endocrinology consultant at PSRI Hospital, warns that many of these signs are not specific to high blood sugar and cannot be used alone to diagnose diabetes.

Symptom Breakdown

Excessive thirst and frequent urination are more reliable indicators, especially when paired with tiredness, blurred vision, or unexplained weight loss. When blood sugar stays high, the kidneys try to flush out the extra glucose through urine, which causes fluid loss and triggers intense thirst. Itchy skin can also happen due to dehydration or frequent fungal infections linked to high sugar, but dry skin or allergies often cause itching too. Sugar cravings, poor sleep, and body aches are not direct signs of high blood sugar on their own, as lifestyle factors, stress, diet, or other health conditions usually cause them. However, poor sleep can lower how efficiently the body uses insulin, and long-term high sugar can cause nerve damage known as diabetic neuropathy, leading to burning or tingling in the hands and feet.

Testing and Screening

Dr Chawla stresses that physical symptoms alone cannot confirm high blood sugar, and a proper blood test is necessary. People experiencing persistent thirst, frequent urination, fatigue, blurred vision, weight loss, or repeat infections should get tested rather than wait for symptoms to worsen. Because diabetes and prediabetes often develop with very few or no signs, individuals with risk factors should undergo routine checks such as fasting blood glucose and HbA1c tests as recommended by a doctor.

Context

High blood sugar develops when the body cannot properly produce or use insulin, a hormone that regulates sugar levels in the blood. While physical discomforts often prompt people to seek medical help, relying on symptoms alone can miss early stages of metabolic conditions like prediabetes. Regular clinical screening remains the only accurate method to track blood glucose levels safely.