Many early signs of diabetes are often linked to blood sugar changes that happen during sleep. While people usually focus on daytime symptoms like thirst or fatigue, nighttime warning signs can sometimes appear first and provide important clues about overall health.

One common sign is frequent urination at night. Waking up multiple times to use the bathroom may happen because high blood sugar forces the kidneys to remove excess glucose through urine, increasing fluid loss.

Another possible symptom is night sweats. In some cases, these may occur when blood sugar drops too low during sleep, triggering stress hormones that cause sweating, a fast heartbeat, and sudden awakenings.