What Dermatographia Looks Like: Photos

Dermatographia welts are raised, pale-centred lines that follow the exact path of the pressure that caused them. They typically rise within 2 to 5 minutes and fade completely within 15 to 60 minutes, leaving no mark behind.

Every photo below lists the body area, the trigger, and how long the flare took to settle. Presentation varies a lot between people and skin tones — use these as a reference, not a diagnosis.

Fresh welts

Minutes after pressure. The wheal traces the exact path of the scratch or object, raised and warm to the touch.

The word SKIN raised in red welts on a forearm after being traced with a fingertip — Forearm
Word traced with a fingernail
Faded in about 30 minutes

Back of a hand with thin raised welt lines following scratch marks — Back of hand
Light scratching
Faded in about 20 minutes

Lower back covered in raised criss-crossing welts from scratching — Lower back
Scratching an itchy patch
Faded in about 45 minutes

The word HELP raised in pale welts on a forearm — Forearm
Word traced with a fingernail
Faded in about 25 minutes

A star drawn on a forearm appearing as raised pale welts — Forearm
Star drawn with a fingertip
Faded in about 20 minutes

Neck with raised red streaks following a light scratch — Neck
Scratching under a shirt collar
Faded in about 30 minutes

Faded welts, 15–60 minutes later

The same skin once histamine has been broken down. Typical dermatographia leaves no lasting mark.

Back of a hand with faint pink residual marks as welts settle — Back of hand
Same hand photographed as the flare settled
Almost clear at 40 minutes

Lower back with broad pink flush and softened welt outlines — Lower back
Flare resolving after antihistamine
Flush cleared within the hour

Forearm covered in soft pink parallel stripes left by fabric ribbing — Forearm
Ribbed sleeve pressed against the arm
Faded in about 30 minutes

Side of the torso with pale criss-crossing lines as a flare settles — Side of torso
Bedding creases overnight
Cleared within an hour of getting up

Pressure and clothing marks

Sustained contact from waistbands, straps, seams, and gripped objects produces welts in the shape of whatever pressed on the skin.

Palm showing a ridged red imprint left by gripping a textured object — Palm
Gripping a ridged handle
Faded in about 15 minutes

Abdomen with raised welts running along the waistband line — Waistline and abdomen
Elastic waistband worn all day
Faded about an hour after changing clothes

A raised red band across the abdomen exactly where a waistband sat — Waistline
Snug waistband worn for several hours
Faded about 40 minutes after changing

Neck with a red raised band along the line of a shirt collar — Neck
Collar rubbing during a warm day
Faded in about 35 minutes

Stress and heat flares

Emotional stress, heat, and exercise lower the threshold, so ordinary contact produces blotchier, patchier wheals.

Neck and chest with blotchy raised red patches during a flare — Neck and chest
Stressful day plus collar friction
Faded in about 45 minutes

Neck and upper chest with a widespread red flush and raised bumps — Neck and upper chest
Heat and anxiety
Settled about 35 minutes after cooling down

Hip and side of torso with widespread blotchy raised red patches — Hip and side
Towel drying after a hot shower
Faded in about 50 minutes

Chest and collarbone with a broad red flush spreading under an open cardigan — Chest and collarbone
Stress and a warm room
Faded in about 30 minutes

Thigh covered in blotchy raised pink wheals after exercise — Thigh
Heat and friction during exercise
Faded in about 45 minutes

Back with large soft-edged red patches and pale raised areas — Upper back
Hot shower and towel drying
Faded in about an hour

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