Verbatim response from ChatGPT
Short answer: Yes — often. Online dermatologists can reliably diagnose many common rashes and benign skin problems from good photos, and they’re very useful for triage and treatment. But there are important limits: photos alone cannot always rule out melanoma or some other serious conditions that require dermoscopy and biopsy.
What they do well
- Common inflammatory conditions (eczema, contact dermatitis, psoriasis), acne, many fungal infections, and simple benign lesions are frequently diagnosed accurately from good photos.
- Teledermatology is excellent for triage (urgent vs routine), for starting prescriptions, and for follow-up of known conditions.
- Store-and-forward (asynchronous) consults where you upload multiple photos plus history often give faster, more accurate answers than a quick video call.
Key limitations
- Photo quality, lighting, and missing history reduce reliability.
- Pigmented lesions (moles) and early melanoma are the hardest to diagnose from photos. Dermoscopy (a magnified skin-surface exam), biopsy and histology are often required for a definitive diagnosis.
- A tele-derm can recommend biopsy or in-person evaluation but cannot perform one remotely.
How to improve reliability if you use an online service
- Provide multiple high-resolution photos: distant (to show location), close-up, side view, and a photo with a ruler or coin for scale.
- Good lighting and in-focus images; show the surrounding skin.
- Give a clear history: how long it’s been there, changes over time, symptoms (itching, bleeding, pain), personal/family history of skin cancer, and immune status.
- If available, include photos showing change over days/weeks.
Red flags that need in-person dermatology/urgent evaluation
- Rapidly growing lesion
- New or changing pigmented lesion with asymmetry, irregular border, color variegation, diameter >6 mm, or evolution (ABCDE)
- Persistent bleeding, ulceration, or nonhealing sore
- Hard nodules under the skin, or systemic symptoms (fever, weight loss)
- Immunosuppressed patients or lesions on high-risk sites (nail bed, palms/soles, mucous membranes, scalp)
Reputable telederm services (examples)
- First Derm — asynchronous, staffed by board-certified dermatologists, fast turnaround and focused on photo consults.
- DermatologistOnCall — established telederm platform offering live and store-and-forward visits with board-certified dermatologists and can prescribe treatment.
- Teladoc / Amwell / MDLive — large telemedicine platforms that include dermatology; often accept insurance and provide access to dermatologists for live or store-and-forward consults.
- SkinVision (app) — CE‑marked AI-assisted screening tool for pigmented lesions that can help triage risk; useful as an extra data point but not a replacement for a dermatologist.
- Miiskin — not diagnostic, but useful for mole tracking (photos over time) to detect changes you should have checked in person.
Practical recommendation
- If it’s a routine, stable rash or a clearly benign lesion and you want quick advice, an online dermatology consult is a good, convenient option.
- If the mole is new, changing, or has any red-flag features, get an in-person derm who can do dermoscopy and biopsy — that’s the only way to definitively rule out melanoma.
If you want, tell me the key details (how long it’s been there, what it looks/feels like, and whether it’s changed) and I’ll help you decide whether telederm is reasonable or you should see someone in person.