Redness
Understanding Skin Redness
Skin redness is a visible change in skin color caused by increased blood flow near the skin’s surface. It’s not a condition on its own—it’s a symptom that can have many different triggers.
What’s Happening Beneath the Surface
When redness appears, capillaries widen and more blood flows through them. If inflammation is present, immune cells release chemical signals (like histamines) that make the vessels even leakier, allowing fluids and immune cells to enter the tissue—this is why redness can be accompanied by swelling, heat, or tenderness.
Computer Vision Detecting Redness
Modern smartphones, equipped with high-resolution cameras can now detect skin redness with surprising accuracy. Tejo works by analyzing the color values in each pixel, measuring subtle shifts toward red tones, and comparing them against calibrated baselines. Tejo uses AI algorithms that adjust for lighting conditions, skin tone variations, and shadows, allowing us to differentiate between natural blush, temporary flushing, and signs of irritation or inflammation. We are able to map the exact location and intensity of redness, making it easier for professionals to track changes over time and recommend targeted treatments.
Common Causes of Skin Redness
- Increased blood flow (vasodilation) – This is the body’s natural way of delivering more immune cells or oxygen to an area. It happens during heat exposure, after exercise, or when the body reacts to injury or irritation.
- Inflammation – Skin may become red as part of its defense against bacteria, allergens, or irritants (as in acne, eczema, psoriasis, sunburn, or allergic reactions).
- Irritation – Harsh exfoliants, fragrances, or strong actives can cause redness if the skin barrier is compromised.
Soothing and Preventing Redness
- Use cool compresses post-treatment
- Apply soothing ingredients like aloe vera, chamomile, or centella asiatica
- Avoid over-exfoliation and harsh actives
- Protect skin with broad-spectrum SPF daily
- Support the skin barrier with ceramide-rich moisturizers
Treatment Considerations
In a spa setting, skin redness might appear after treatments like exfoliation, microneedling, or extractions. Mild redness is a normal, temporary reaction as blood flow increases to the area for healing. However, persistent redness or burning sensations should be addressed by stopping the treatment, soothing the skin, and, if needed, referring the client to a dermatologist.
