Dermdle.

Today’s diagnostic challenge

What’s your diagnosis?

Reviewed teaching case

Dorsal view of both hands showing multiple vesicles, crusted erosions, atrophic scars, dyspigmentation, and small white papules over the hands and finger joints.
Watermarked image sourced from DermNetDermNet Image Licence; noncommercial educational use

A daily practice ritual

Visual diagnosis first.
Context when you need it.

Dermdle pairs the challenge of a dermatology Kodachrome session with a two-to-five-minute daily format. Every incorrect attempt unlocks a more specific clue.

See how scoring works
Five stagesFrom photograph-only recognition to a highly specific clue.
One shared caseThe same server-selected challenge for everyone each day.
Learn afterReviewed explanations appear only when the round ends.
Review gatedRights, references, and medical review before publication.