My sugar is fine, but I feel terrible: Doctor explains what your diabetes report may be missing - The Times of India

Many people sit across the doctor’s desk with a puzzled look. Their blood sugar report says “within range.” Their HbA1c looks acceptable. Yet they feel drained, foggy, irritable, or simply not themselves.Dr Chirag Tandon, Director – Internal Medicine, ShardaCare Healthcity, sees this often. He explains, “Many patients walk into my clinic saying, ‘My sugar levels are normal, but I still feel exhausted, foggy, or unwell.’ Here we must see what is behind a single figure on a diabetes report. Although Haemoglobin A1c and fasting glucose are significant, they do not give the entire picture of the impact of diabetes on the body in the daily sense.”Diabetes is not a single number. It is a full-body metabolic condition. And sometimes, the report misses what the body is quietly struggling with.HbA1c reflects the average blood sugar over the past two to three months. Fasting glucose shows sugar levels after an overnight fast. Both are important. Both guide treatment. But both are averages.An average can hide extremes.A person may have frequent spikes after meals and occasional dips during the day. These swings may cancel each other out on paper. But inside the body, they can cause fatigue, mood shifts, and even headaches.The NIH explains that HbA1c reflects an average and does not capture daily fluctuations. So the report may look steady. The body may not feel steady.Post-meal sugar spikes are common, especially with refined carbohydrates. These spikes can cause sleepiness, irritability, and brain fog. Later, sugar may drop quickly, leading to shakiness or weakness.Dr Tandon notes that hidden fluctuations often go undetected in routine reports. A single fasting value in the morning cannot reveal what happens after lunch or dinner.Continuous glucose monitoring, now widely used, shows these patterns clearly. It often explains why someone feels tired at 4 pm despite “normal” lab results.“Diabetes is not merely a sugar issue, it is a metabolic disorder that influences energy, hormones, mental well-being, gut well-being and even immunity,” Dr Tandon says.That statement changes the frame.High glucose affects blood vessels, nerves, and organs over time. But even before complications appear, subtle imbalances can drain energy.Chronic inflammation, poor gut health, and insulin resistance may exist even when fasting sugar looks controlled. A study published in the Frontiers highlights how insulin resistance is linked with inflammation and metabolic stress. When metabolism is strained, the body feels heavy. Concentration drops. Motivation fades.Sometimes the real reason behind fatigue lies elsewhere.Thyroid disorders commonly coexist with diabetes. Anemia, especially iron deficiency, can reduce oxygen delivery to tissues. Vitamin B12 deficiency, which may occur in long-term metformin users, can also cause tiredness and numbness.Dr Tandon points out that co-existing conditions often go undetected in routine sugar reports. A person may chase glucose numbers for months while the real issue is low hemoglobin or an underactive thyroid.These factors rarely appear on a basic diabetes panel. Yet they deeply affect daily well-being.Lifestyle patterns shape sugar control more than many realise.Irregular meals, late nights, emotional stress, and sedentary routines disturb hormones like cortisol. Poor sleep alone can worsen insulin sensitivity.A study from Sleep Science, notes the strong link between sleep, stress, and blood sugar regulation. When sleep suffers, glucose control becomes unpredictable. When stress rises, sugar levels may climb even without extra food.Lab reports do not measure burnout. They do not measure emotional strain. Yet both affect diabetes deeply.“A person can have ‘controlled’ numbers and still experience fatigue, mood changes, weight gain, or recurrent infections if these underlying factors are ignored,” Dr Tandon explains.This is why he stresses a shift in approach.“Diabetes care must shift from number-centric management to person-centric care. Continuous monitoring, personalized nutrition, movement plans, mental well-being support, and regular clinical reviews help uncover what reports miss. When we treat the person, not just the glucose value, patients don’t just see better numbers — they actually start to feel better.”This shift matters. It means looking beyond a single lab sheet. It means asking deeper questions. It means reviewing patterns, not snapshots.Feeling unwell despite normal sugar levels is not “in the head.” It is often a clue.A detailed review may include:Post-meal glucose trackingThyroid profileIron levels and vitamin B12Sleep assessmentStress evaluationMedication reviewSometimes small changes help. Balanced meals. Regular movement. Earlier sleep. Stress support. Other times, medical adjustments are needed.The key is simple: if the body feels off, the conversation must go beyond numbers.Medical experts consulted This article includes expert inputs shared with TOI Health by: Dr Chirag Tandon, Director – Internal Medicine, ShardaCare HealthcityInputs were used to explain how diabetes reports can miss a few things and why it matters.