The duration of redness after blue light therapy depends on the intensity of treatment and your skin type, but here’s a general guideline:
Typical Redness Duration
- Mild At-Home Treatment (LED masks, handheld devices):
- 0–2 hours (usually no lingering redness).
- Professional Treatment (Dermatologist/clinic sessions):
- A few hours to 1 day (stronger devices may cause slight flushing).
- For Sensitive Skin/Rosacea:
- Up to 24–48 hours (if skin is reactive).
Why Does It Happen?
- Blue light temporarily stresses bacteria and oil glands, causing mild inflammation.
- Some devices also emit heat, which can increase redness.
How to Reduce Redness Faster
- Apply Aloe Vera or a Soothing Serum (e.g., centella asiatica, niacinamide).
- Use a Cold Compress (5–10 mins) to calm skin.
- Avoid Actives After Treatment (retinol, acids, vitamin C for 24 hrs).
- Moisturize & Use SPF (if going outside).
When to Worry
- If redness lasts more than 2 days, develops swelling/burning, or looks like a sunburn, consult a dermatologist (rare, but possible with overuse or sensitive skin).