I can suggest safe topical creams and practical next steps to help fade chickenpox marks you've had for 20 years.

🩺 What this likely is

• These long-standing marks are most often post-inflammatory hyperpigmentation (flat brown marks) or atrophic/pitted scars from chickenpox; treatment differs by type, so choice should match whether the marks are flat or indented.

💊 Creams and topical options to consider

• Mederma Advanced Plus Scar Gel (onion extract + allantoin): a well‑tolerated topical for fading scars and improving texture; suitable for long-standing scars.
• Silicone gel or sheets: effective for raised/keloid scars and safe for long-term use.
• Topical brightening agents (start OTC (over‑the‑counter) options): niacinamide, vitamin C serums, or azelaic acid — helpful for hyperpigmentation.
• Prescription options from a dermatologist: topical retinoids (tretinoin) or hydroquinone may be recommended for stubborn pigment but require medical supervision.

🏥 How to use / next steps

• Patch test new cream on a small area for 48 hours.
• Use consistently as directed (many topicals need 8–12 weeks to show change).
• Daily broad‑spectrum sunscreen SPF (sun protection factor) 30–50 is essential to prevent darkening.
• Consult a dermatologist for assessment and to discuss in‑office options (chemical peels, microneedling, lasers) if topicals are insufficient.

⚠️ Warning signs

• New pain, increasing redness, swelling, discharge, or severe irritation — stop product and see a doctor.
• Rapid change in a mark’s appearance or bleeding — see a doctor promptly.

🩺 FOLLOW_UP

• Do the marks look mostly flat/dark or are they pitted/indented?