Community AnswerAnswered by Dr. Emily Smith, MDAnswered: 1/18/2025Several factors can cause your A1C levels to rise, including: High Blood Sugar Levels: Consistently high blood glucose levels over time will increase your A1C. Poor Diet: Consuming foods high in sugar and refined carbohydrates can lead to elevated blood sugar levels. Lack of Physical Activity: Regular exercise helps regulate blood sugar levels; inactivity can contribute to higher A1C. Medication Non-Adherence: Not taking prescribed diabetes medications or insulin as directed can result in higher A1C levels. Stress and Illness: Physical or emotional stress and illnesses can temporarily raise blood sugar levels. Certain Medical Conditions: Conditions like anemia, kidney disease, or liver disease can affect A1C accuracy. If your A1C is consistently high, consult your healthcare provider to adjust your diabetes management plan.