Rash
Most rashes are due to eczema, allergic reactions, viral illness, heat and sweat, or contact irritants and settle with simple treatment. A non-blanching purple rash (does not fade under pressure), a rash with facial or throat swelling, breathing difficulty, high fever or rapidly spreading redness needs emergency care.
Key information
- Symptom
- Rash
- Category
- Skin
- Common possible causes
- Eczema, Contact dermatitis (soaps, jewellery, plants), Urticaria (hives), Viral exanthem
- Tests that may be considered
- Full blood count, CRP, Liver and kidney function if drug reaction, Specific IgE testing where allergy suspected
- Clinic assessment
- Available same day
- Home doctor visit
- Available across Dubai
- Home blood test
- Available across Dubai
- Date reviewed
- 2026-07-01
What this symptom means
Rash is any change in the colour, texture or appearance of the skin.
Common possible causes
- · Eczema
- · Contact dermatitis (soaps, jewellery, plants)
- · Urticaria (hives)
- · Viral exanthem
- · Heat rash (prickly heat) — common in Dubai
- · Fungal skin infection
- · Drug reactions
Less common possible causes
- · Psoriasis
- · Scabies
- · Shingles
- · Autoimmune skin disease
Serious causes that must not be missed
- · Meningococcal septicaemia (non-blanching rash)
- · Anaphylaxis
- · Stevens-Johnson syndrome / TEN
- · Cellulitis or necrotising fasciitis
- · Non-blanching purple rash that does not fade under pressure
- · Rash with facial, lip or tongue swelling
- · Rash with breathing difficulty
- · Rapidly spreading painful red rash with fever
- · Blistering, peeling skin or mucosal involvement
Call 998 (UAE ambulance) or attend the nearest emergency department for any of the above.
When a same-day GP is appropriate
- · Widespread new rash with feeling unwell
- · Rash after a new medication
- · Painful spreading redness
When a routine GP appointment is fine
- · Chronic eczema or psoriasis for review
- · Recurrent hives
- · Suspected fungal or contact dermatitis
Questions a doctor may ask
- · When did the rash start and where?
- · Is it itchy, painful or numb?
- · Any new medications, foods, cosmetics or exposures?
- · Any fever, joint pain or swelling?
- · Does it fade under pressure (blanch)?
History factors that may matter
- · Eczema, asthma, hay fever (atopy)
- · Known drug allergies
- · Recent travel
- · New skin or hair products
Medicines that may contribute
- · Antibiotics
- · NSAIDs
- · Anticonvulsants
- · Allopurinol
Never stop a prescribed medication without discussing it with a clinician.
What may happen during the examination
- · Full skin, nail and mucosal examination
- · Observations if unwell
- · Assessment of blanching under pressure
Tests that may be considered
Blood tests
- · Full blood count
- · CRP
- · Liver and kidney function if drug reaction
- · Specific IgE testing where allergy suspected
Other tests
- · Skin swab or scraping for infection
- · Skin biopsy under dermatology where needed
When a specialist referral may be considered
- · Dermatology for persistent or unclear rashes
- · Immunology / allergy for suspected drug or food allergy
- · Emergency for red-flag features
Possible treatment approaches
- · Emollients and topical steroids for eczema
- · Antihistamines for hives
- · Antifungal cream for fungal infection
- · Removal of causative agent for contact dermatitis
- · Adrenaline auto-injector for anaphylaxis (emergency)
Safe self-care
- · Regular emollient use in Dubai’s air-conditioned dryness
- · Cool showers for heat rash
- · Avoid known irritants
- · Loose cotton clothing
Best avoided
- · Multiple over-the-counter creams without a diagnosis
- · Ignoring a non-blanching rash
- · Scratching — worsens eczema and can cause infection
How Aafiyah can help
- · GP assessment in clinic or at home
- · Skin swabs and blood testing
- · Allergy testing referral
- · Dermatology referral where needed
Related tests
Related conditions
- Eczema
- Psoriasis
- Hives (urticaria)
- Contact dermatitis
Related symptoms
Frequently asked questions
When is a rash an emergency?+
A purple, non-blanching rash that does not fade under pressure — especially with fever, headache or drowsiness — is an emergency. So is any rash with facial or throat swelling, breathing difficulty, or blistering with mucosal involvement.
Why do I get heat rash in Dubai?+
Sweat trapped under blocked sweat ducts causes prickly heat, especially in humid summer months. Cool showers, loose cotton clothing and air-conditioned rest usually resolve it.
Can I get allergy testing in Dubai?+
Yes — we offer allergen-specific IgE blood testing at our clinic or at home across Dubai.
Medical references
- · NICE CKS — Urticaria and rash assessment — cks.nice.org.uk
- · NHS — Rashes in adults — nhs.uk
Medically reviewed by: Dr Shahbaz Afzal — British-trained Family Medicine Consultant, DHA-licensed
Written: 2026-07-01 · Reviewed: 2026-07-01 · Next review: 2027-01-01
This page provides general medical information for people in Dubai and the UAE. It does not replace personal medical advice, diagnosis or treatment. Always seek the advice of a qualified clinician about any medical concern.
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