dawn phenomenon; dawn effect
Medical term for the early-morning rise in blood sugar levels, typically between 4 a.m. and 8 a.m., seen in people with diabetes.
The dawn phenomenon is a state of high blood sugar in the early morning often seen in diabetic patients.
Compound of 暁 (あかつき, 'dawn') and 現象 (げんしょう, 'phenomenon'), directly translating the English medical term 'dawn phenomenon'.