What is the best online treatment for melasma and dark spots?

Short answer: the most effective "online" approach for melasma and dark spots is teledermatology (a board‑certified dermatologist who can prescribe/compound targeted prescriptions) combined with strict daily sun protection and a layered topical routine (azelaic acid, retinoid, antioxidant). Lasers/peels can help but must be done in‑person by an experienced clinician because they can worsen melasma.

Recommended online services (by region)

• Curology (U.S.) — subscription telederm that provides custom prescription topical formulas (retinoid/bleaching agents) and regular follow‑ups. Good for getting prescription strength tretinoin/other actives remotely.
• Apostrophe (U.S.) — connects you with board‑certified dermatologists who can prescribe treatments for hyperpigmentation (hydroquinone, tretinoin, topical tranexamic acid, etc.) and provide ongoing care.
• Dermatica (U.K./EU) — focuses on compounded topical prescriptions for pigmentation (tretinoin + depigmenting agents) with remote monitoring. If you’re outside these markets tell me your country and I can suggest services available to you.

Recommended products/ingredients (can often be started online)

• Azelaic acid: The Ordinary Azelaic Acid 10% (affordable OTC) or prescription azelaic gel (Finacea) — effective and well tolerated for melasma.
• Retinoid: tretinoin (prescription) is highly effective; adapalene (Differin OTC) is a gentler OTC option. A telederm can prescribe stronger tretinoin.
• Hydroquinone (2–4%): the classic depigmenting agent — best used short term under a dermatologist’s supervision (often prescription).
• Tranexamic acid: topical or oral tranexamic acid can help recalcitrant melasma but requires medical follow‑up (oral form should be prescribed by a clinician after screening).
• Antioxidant + vitamin C serums: SkinCeuticals C E Ferulic (premium) or more affordable vitamin C serums to help brighten.
• Affordable brighteners: The Ordinary Alpha Arbutin 2% + HA, and niacinamide serums can help as adjuncts.
• Sunscreen (essential): EltaMD UV Clear (broadly recommended for pigment‑prone skin), La Roche‑Posay Anthelios (very good alternatives). Use SPF 30–50 daily, reapply, and use physical sun protection (hat, avoid midday sun).

How to proceed (practical plan)

1. Start strict sun protection immediately (broad‑spectrum SPF 30–50 every day + physical barriers). This is the single most important step.
2. Begin an azelaic acid product (or get a prescription azelaic gel) and add a retinoid at night (adapalene OTC or get tretinoin from telederm).
3. If insufficient after 8–12 weeks, use telederm to get prescription options (short course hydroquinone, compounded combos, or topical tranexamic acid). Oral tranexamic acid or in‑office peels/lasers are second‑line and must be prescribed/performed by specialists.
4. Arrange regular follow‑ups (telederm platforms above provide this).

Warnings

• Melasma is chronic and can relapse; expect months of treatment and maintenance.
• Some treatments (hydroquinone, lasers, certain peels) can cause rebound hyperpigmentation if used improperly. Always use under dermatologic guidance.
• Oral tranexamic acid has contraindications (clotting risk) and needs medical screening.

If you want, tell me your country, skin tone, and whether you’ve already tried anything — I can recommend a specific product stack and the most appropriate telederm service available to you.