When should you arrange a dermatology assessment?

Arrange an assessment when a rash has not been diagnosed, changes pattern, spreads, disrupts sleep or daily life, affects a high-impact site, or does not improve as expected. Help should not be delayed until a large area is involved.

  • You are unsure whether the rash is psoriasis, fungal infection, seborrhoeic dermatitis, contact dermatitis, or something else.
  • Topical treatment is not helping, is difficult to use, or causes an adverse effect.
  • The face, scalp, nails, palms, soles, folds, or genitals are affected.
  • The rash disrupts sleep, causes pain, limits hand use or walking, leads to social withdrawal, or affects mood.
  • A child may have psoriasis, or an adult is pregnant, planning pregnancy, or breastfeeding.

[1, 2]

Which symptoms need urgent same-day care?

Widespread skin redness or colour change, tenderness, and rapid spread, or many pustules with fever, chills, a fast heartbeat, or feeling very unwell may indicate severe psoriasis or infection and require immediate assessment.

Go to the nearest emergency department for severe symptoms. In Thailand, call 1669 for emergency medical assistance. Do not drive if it would be unsafe. Bring a list of medicines, especially anything recently started, stopped, or changed.

[1, 3, 2, 4]

Which joint symptoms may be related to psoriatic arthritis?

Symptoms to report include recurring joint pain, swelling or tenderness, stiffness on waking or after rest, an entire swollen finger or toe, heel pain, or lower-back stiffness. They can occur even when skin disease is not severe.

These symptoms do not prove psoriatic arthritis because other joint conditions can look similar. If suspected, rheumatology assessment is appropriate. Earlier recognition and treatment may reduce the risk of joint damage.

[5, 1]

What should you prepare for an appointment?

Prepare a symptom timeline, a list of current medicines, treatments already tried, adverse effects, other health conditions, family history, nail and joint symptoms, and the questions you want answered.

[6, 1]

References

These references informed the source copy and are not personal medical advice.

  1. Psoriasis: assessment and management (CG153) — Recommendations. National Institute for Health and Care Excellence. 2012; revised 2017; minor updates 2025.
  2. Psoriasis. National Health Service. updated 2026.
  3. Types of psoriasis and serious warning signs. American Academy of Dermatology. current patient guidance.
  4. Emergency illness: call 1669. National Institute for Emergency Medicine, Thailand. current official contact information.
  5. Psoriatic arthritis: Symptoms. American Academy of Dermatology. current patient guidance.
  6. Psoriasis: Diagnosis and treatment. American Academy of Dermatology. current patient guidance.