Comedones and inflammatory papules or pustules may occur in a characteristic distribution. Confirm morphology before attaching a label.
Tomorrow Mode · Rotation starts tomorrow
You do not need everything tonight. You need the right things.
Choose the time you actually have. Learn enough to recognize, describe, communicate, reason, and function in clinic—without trying to become a dermatologist overnight.
Tonight’s rule: prioritize a repeatable workflow, then sleep. This is supervised educational preparation, not individualized diagnosis or treatment guidance.
Enter where you are
How much time do you have?
Every path is complete enough to stop at its endpoint.
Emergency minimum10 minutes
Morphology sequence, presentation formula, morning checklist.
Best short path30 minutesAdd common patterns and diagnoses.
Prepared first day60 minutesAdd treatment concepts, procedures, and rapid-fire review.
Complete pathwayFull nightStructured practice without textbook overload.
10-minute pathway · Absolute essentials
If you learn only this, learn this.
- Describe before you diagnose.Location/distribution → primary lesion → number/size → color → configuration → surface/secondary change.
- Present in one organized sentence.Lead with morphology and distribution; then give the relevant timeline, symptoms, exposures, medications, and focused differential.
- Know your role.Observe, measure, ask focused questions, document accurately, and confirm plans with your supervising clinician.
- Prepare the room, not a performance.Arrive early, know the workflow, have a pen and measurement tool if supplied, and be ready to help.
Say it like this
“On the bilateral extensor forearms, there are multiple, symmetric, sharply demarcated plaques with overlying scale. The eruption began three months ago, is pruritic, and there is no reported mucosal involvement.”
You may stop here. Save the morning card, set out what you need, and sleep.
30-minute pathway
Recognize → describe → communicate.
Morphology essentials
Flat
Macule/patch family: color change without palpable elevation. Use the DermPrep glossary for the complete canonical definitions.
Solid and raised
Papule/plaque/nodule family: note width, depth, surface, and palpability.
Fluid-filled
Vesicle/bulla/pustule family: describe the fluid-filled lesion and surrounding findings.
Surface or loss
Scale, crust, erosion, ulcer, excoriation, or lichenification may reflect evolution or secondary change.
Complete lesion-description formula
There are [number] [size + color] [primary lesions] with [surface/change], arranged in a [configuration] and distributed [where/how].
Weak
“The patient has a red rash.”
Stronger
“There are multiple, well-demarcated pink-brown plaques with overlying scale distributed symmetrically on the extensor elbows and knees.”
Common patterns worth recognizing
An inflammatory pattern may include itch, color change, scale, vesiculation, crusting, or lichenification, with appearance varying by stage and skin tone.
Papules or plaques with scale invite attention to distribution, border, configuration, nails, scalp, medications, and time course.
Use morphology, distribution, symptoms, exposures, immune status, and systemic findings. Do not infer an organism or treatment from appearance alone.
Describe shape, surface, symmetry, border, and change over time rather than declaring a lesion benign from appearance alone.
A new, changing, symptomatic, atypical, or otherwise concerning lesion should be brought to the supervising clinician’s attention.
What Would You Say?
Know / Say / Do
Know
The description sequence, the major lesion families, and the day’s clinic expectations.
Say
One concise morphology-first sentence, then a focused history and calibrated differential.
Do
Look closely, palpate when appropriate, measure, ask permission, preserve dignity, and confirm every plan with supervision.
60-minute pathway
Add enough context to follow clinic.
Common diagnoses to recognize—not manage independently
Acne vulgarisLook for comedonal and inflammatory acneiform lesions; describe distribution, severity, scarring, and prior treatment.
Atopic dermatitisRecognize a pruritic eczematous pattern while remembering that morphology and distribution vary with age, chronicity, treatment, and skin tone.
PsoriasisDescribe the papulosquamous morphology and distribution; note relevant scalp, nail, fold, and joint findings.
Seborrheic dermatitisRecognize scale in sebaceous distributions and compare it with other scalp and facial inflammatory patterns.
Contact dermatitisConnect eczematous morphology with a focused exposure history, distribution, and timeline.
VerrucaDescribe the keratinizing papular growth pattern, including location and surface.
Possible dermatophyte infectionAnnular or scaly morphology can have several causes; testing and treatment decisions belong to the clinical team.
Actinic keratosis and common skin cancersA persistent, changing, symptomatic, or atypical lesion may warrant focused evaluation rather than a visual-only conclusion.
Treatment concepts worth knowing
- Treatment follows diagnosis and context. Site, age, pregnancy status, comorbidities, disease severity, infection risk, medications, and prior response can change the plan.
- Topical therapy is not one category. Vehicle, potency, quantity, application site, duration, and adverse-effect risk matter.
- Systemic therapies require indication-specific screening and monitoring. Discuss the applicable plan with the supervising clinician rather than relying on a universal checklist.
- Procedures and diagnostics may clarify the diagnosis. The clinical team may consider biopsy, scraping, culture, microscopy, photography, dermoscopy, or laboratory evaluation when appropriate.
- Communication supports adherence. Ask how the treatment will be used, what barriers may exist, and what the patient understands.
Procedures you may see
Shave biopsySampling technique selected according to lesion and diagnostic question.
Punch biopsyFull-thickness cylindrical sample; site, depth, closure, and diagnostic goal matter.
Excisional biopsy/excisionRemoval with planned margins and closure based on clinical purpose.
CryotherapyControlled tissue destruction using cold, commonly liquid nitrogen.
Curettage and electrosurgeryDestructive techniques used for selected indications.
Intralesional injectionMedication delivered into a lesion for selected conditions.
Scope boundary: Recognition is not procedural competency. Observe consent, site verification, sterile/clean technique as applicable, specimen labeling, hemostasis, wound care, and supervision. Never perform a procedure without authorization, training, and direct supervision.
Rapid-fire review
Full-night pathway
A complete path that still respects your time.
- 15 min · LanguageReview the description sequence and major morphology families.
- 20 min · RecognitionOpen the rights-cleared Visual Diagnosis starter set when available.
- 15 min · CommunicationSay three descriptions aloud using the clinic presentation formula.
- 20 min · Common clinicReview common patterns and the limited treatment/procedure concepts above.
- 15 min · RetrievalComplete a focused Pimp Me set; review explanations, not just the score.
- 10 min · LogisticsConfirm arrival time, location, dress expectations, access, parking, and what to bring.
- StopPrepare your morning items and sleep. Do not replace rest with low-yield cramming.
Clinic presentation guidance
One-liner → timeline/symptoms → focused exposures/medications → morphology and distribution → relevant associated findings → prioritized differential → question or next step for your supervisor.
Say it like this
“This is a patient with a three-month pruritic eruption consisting of multiple, symmetric, well-demarcated scaly plaques on the extensor elbows and knees. I would like to clarify scalp, nail, intertriginous, and joint involvement and review medications before narrowing the differential.”
Consult-service basics
- Clarify the consult question and urgency with the requesting team.
- Build a focused timeline, including new medications, exposures, systemic symptoms, immune status, and treatments already tried.
- Follow the supervising service’s expectations for examination and documentation, including relevant mucosal, hair, nail, and body-site findings when appropriate and consented.
- Communicate morphology, distribution, leading considerations, and uncertainty clearly.
- Do not promise a diagnosis, biopsy, or treatment plan before supervisory review.
- Follow your institution’s policies for clinical photography, consent, secure storage, and messaging.
Common Mistake
Trying to memorize every diagnosis
Learn a description and reasoning workflow that transfers across cases.
Diagnosing before examining
Slow down: morphology and distribution first.
Hiding uncertainty
State what you know, what you do not, and what would change your differential.
Overtalking
Lead with the most discriminating findings; keep background focused.
Ignoring medications
Medication start dates and dose changes can matter.
Acting beyond your role
Ask, observe, assist, and verify. Supervision is part of safe learning.
Commonly Confused
Primary lesion vs secondary change
Name the basic lesion first; then describe scale, crust, erosion, excoriation, or other evolution.
Distribution vs configuration
Distribution asks where; configuration asks how lesions are arranged.
Diagnosis vs differential
A diagnosis is a conclusion; a differential is a prioritized set of plausible explanations supported and separated by evidence.
Recognition vs procedural competence
Knowing why a procedure is considered does not qualify a learner to perform it.
What Changes Your Mind?
Ask which clue most separates your leading possibilities: distribution, border, surface, mucosal involvement, pain, systemic symptoms, medication timing, immune status, evolution, dermoscopic structure, or diagnostic test result.
Clinical pearls
- The best description lets someone picture the eruption before hearing the diagnosis.
- Sparing can be as informative as involvement.
- Color is one feature; texture, scale, palpability, warmth, edema, symptoms, and comparison with surrounding skin may add essential information.
- A calm, focused presentation is stronger than a long unranked differential.
When to escalate
If the patient appears systemically unwell, the eruption is painful or rapidly progressive, there is blistering or skin detachment, purpura with concerning symptoms, or mucosal involvement, escalate promptly through the supervising clinical team.
Retrieval practice
Try one question.
30-second recap
- Describe before you diagnose.
- Use one consistent sequence.
- Present the discriminating findings first.
- Know your role and confirm plans with supervision.
- Choose a path, prepare your morning, and sleep.
Read this before clinic
Your morning card
Before you walk in
- Arrive early enough to find the team and understand the workflow.
- Bring identification, required access, a pen, and only tools approved by the site.
- Review: where, what, how many/how big, color, configuration, surface.
- Ask permission before examination or photography; protect draping and dignity.
- Measure and document rather than guessing.
- Present what you see before what you think.
- Confirm every assessment, procedure, and plan with your supervisor.
Do not
- Photograph patients on a personal device or outside the approved workflow.
- Promise a diagnosis or treatment.
- Perform a procedure without explicit authorization and supervision.
- Describe every inflammatory finding as bright red.
- Give an unranked list when one discriminating clue would be more useful.
- Let fear of being wrong stop you from giving an organized observation.
Attending-style questions
Be ready for these.
Describe the lesion without naming the diagnosis.
Use location/distribution, primary lesion, number/size, color, configuration, and surface/secondary change.
What are your top considerations, and why?
Give a short prioritized differential tied to specific findings—not a memorized list.
What finding would change your differential most?
Name one discriminating clue and explain how it separates leading alternatives.
What else would you examine?
Choose sites based on the morphology and differential, such as scalp, nails, mucosa, folds, palms/soles, or a complete skin examination when indicated and supervised.
What would make this urgent?
State the concerning context or feature, then escalate through the supervising clinical pathway.
Keep the learning loop moving
Next-best actions
Sources & page information
- Nast A, Griffiths CEM, Hay R, et al. The 2016 International League of Dermatological Societies’ revised glossary for the description of cutaneous lesions. Br J Dermatol. 2016;174(6):1351–1358.
- International League of Dermatological Societies. Glossary for Dermatology Terms.
- American Academy of Dermatology. Basic Dermatology Curriculum and guideline library.
- Stanford Medicine 25. The General Dermatology Exam: Learning the Language.
- Centers for Disease Control and Prevention. Standard Precautions and hand-hygiene resources for healthcare settings.