Know your Melasma & PIH Chain
From first trigger to visible dark mark — 3 phases (7 Links )
Melasma
The Sun & Hormone Fire
Phase 1: The Spark
Phase 2: Fire Builds
Phase 3: The Burn & How to Put It Out
PIH
The Injury Fire
Phase 1: The Spark
Phase 2: Fire Builds
Phase 3: The Burn & How to Put It Out
Full Detailed Chains
Phase 1: The Spark
UV Exposure + Hormones
Sun hits your skin while estrogen or progesterone levels are elevated (pregnancy, birth control, perimenopause).
Keratinocytes Release Signals
Skin cells send chemical messengers (α-MSH, endothelin-1) telling melanocytes to wake up.
Intervention: Broad-spectrum SPF 50+Phase 2: Fire Builds
Melanocytes Activate
Pigment-producing cells turn on their melanin factories.
Tyrosinase Enzyme Ramps Up
The key enzyme that converts tyrosine into melanin goes into overdrive.
Intervention: Tyrosinase inhibitors (Kojic Acid, Arbutin)Melanin Overproduction
Excess melanin is packaged into melanosomes.
Transfer to Keratinocytes
Melanosomes move from melanocytes into surrounding skin cells.
Intervention: Niacinamide (blocks transfer)Phase 3: The Burn & How to Put It Out
Visible Dark Patches Appear
Excess melanin accumulates in the epidermis and sometimes dermis, creating brown patches on cheeks, forehead, upper lip.
Fading Timeline
2–4 weeks: First lightening visible. 8–10 weeks: 50–60% fade. 3–3.5 months: Near-clear with consistent treatment.
Intervention: Tranexamic Acid, Vitamin C, Retinoids, Gentle exfoliationPhase 1: The Spark
Skin Injury or Inflammation
Acne, bug bite, scratch, waxing, laser treatment, or any trauma to the skin.
Inflammatory Response
Immune cells rush to the area, releasing cytokines and inflammatory mediators.
Intervention: Anti-inflammatory ingredients (Centella, Niacinamide)Phase 2: Fire Builds
Melanocytes Triggered
Inflammation signals melanocytes to produce melanin as a protective response.
Melanin Synthesis
Tyrosinase enzyme converts tyrosine into melanin.
Intervention: Tyrosinase inhibitors (Kojic Acid, Arbutin)Melanin Deposition
Excess melanin is deposited in the epidermis at the injury site.
Intervention: Niacinamide (blocks transfer)Phase 3: The Burn & How to Put It Out
Dark Spot Appears
A brown or dark mark remains after the initial injury has healed.
Fading Timeline
2–4 weeks: First lightening visible. 8–10 weeks: 50–60% fade. 3–3.5 months: Near-clear with consistent treatment.
Intervention: Vitamin C, Retinoids, Gentle exfoliation, SPF 50+Your triggers create one of 20 possible chains
Pregnancy Melasma
Trigger: Pregnancy hormones + UV
14–21 days to visible mark
Birth Control Melasma
Trigger: Oral contraceptives + UV
14–28 days to visible mark
Perimenopause Melasma
Trigger: Fluctuating hormones + UV
14–30 days to visible mark
HRT Melasma
Trigger: Hormone replacement therapy + UV
14–28 days to visible mark
Genetic Melasma
Trigger: Family history + UV
14–21 days to visible mark
Heat-Induced Melasma
Trigger: Heat exposure + UV
7–14 days to visible mark
Medication-Induced Melasma
Trigger: Photosensitizing drugs + UV
7–21 days to visible mark
Stress Melasma
Trigger: Chronic stress + UV
14–28 days to visible mark
Acne PIH
Trigger: Inflammatory acne
7–14 days to visible mark
Eczema PIH
Trigger: Eczema flare-up
7–21 days to visible mark
Insect Bite PIH
Trigger: Bug bite inflammation
5–10 days to visible mark
Waxing PIH
Trigger: Hair removal trauma
3–7 days to visible mark
Laser PIH
Trigger: Laser treatment
7–14 days to visible mark
Chemical Peel PIH
Trigger: Aggressive exfoliation
7–14 days to visible mark
Scratch PIH
Trigger: Physical trauma
5–10 days to visible mark
Allergic Reaction PIH
Trigger: Contact dermatitis
7–14 days to visible mark
Pregnancy Acne Compound
Trigger: Hormones + acne + UV
7–21 days to visible mark
Birth Control Acne Compound
Trigger: Contraceptives + acne + UV
7–21 days to visible mark
Perimenopause Eczema Compound
Trigger: Hormones + eczema + UV
7–28 days to visible mark
Stress Acne Compound
Trigger: Stress + acne + UV
7–28 days to visible mark
6 Triggers That Keep Melasma & PIH Alive
Every day these 6 hidden triggers fire the chain. Stop them → marks fade faster.
Sun & UV
UV rays activate melanocytes instantly
Hormones
Estrogen surges drive pigment production
Kitchen Heat
Infrared heat penetrates and triggers melanin
Irritants & Folk Remedies
Harsh ingredients inflame and darken skin
Genetics
DNA predisposes melanocytes to overreact
Stress & Inflammation
Cortisol spikes fuel pigment pathways
Trigger activates melanocytes
Melanin overproduction begins
Dark marks appear and persist
Stop the tiggers
Know the root cause and stop the triggers
Official Melasma &PIH Chain Explain
The complete 8-link science of how melasma forms – and how Melaless interrupts it at every step.
Follow for daily tips:
Nutrition & Food Triggers
Which foods and eating habits make melasma worse – and what to eat instead for clearer skin.
Follow for nutrition guidance:
Self-Care for Stress & Sleep
How daily stress and poor sleep fuel your melasma chain – and simple routines that help break it.
Follow for science-based education: