What are the effects of staying up late before donating blood?

If you stay up late the night before donating blood, you may experience a series of adverse reactions such as palpitations, cold sweats, or mild hypoxia.

1. Palpitations

When staying up late, the body does not get sufficient sleep, especially the central nervous system, which fails to rest adequately. This can lead to symptoms such as dizziness, head fullness, and blurred vision. If you donate blood under these conditions, reduced blood volume can significantly worsen symptoms like dizziness, fatigue, and palpitations, negatively affecting your health.

2. Cold Sweats

Staying up late the night before donation may reduce the body's metabolic function, potentially leading to cold sweats after blood donation.

3. Mild Hypoxia

If you stay up late before donating blood, your brain does not rest properly, which may result in yawning and easy fatigue. In hot weather, expanded cerebral blood vessels may further reduce blood supply to the brain.

In addition, staying up late may exacerbate or trigger other health issues. Therefore, blood donors should avoid staying up late and engaging in intense physical activity for at least three days before donation. When necessary, a comprehensive medical check-up is recommended to ensure fitness for donation according to established standards.