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Phenotype: Dermatographia

Lightly or moderately scratching of the skin (dermis) causes reddening into a raised wheal similar to hives. These marks usually disappear within 30 minutes. Also called "skin writing."

Read about it at the Mayo Clinic at http://www.mayoclinic.org/diseases-conditions/dermatographia/basics/definition/con-20025360.

Please respond either YES or NO or SOMETIMES and state the precursor in the text box.

Phenotype	Number of Users
FBN1 Mutation	33
Aquagenic pruritus (episodes)	38
Aphantasia	64
Disseminated Superficial Actinic Porokeratosis	29
Keratoconus Disease	51
Melasma	36

User	Variation
JoDa	Yes, lasting hours
atelepen	None
robynb	yes, lasting hours
Lauren Lupton	yes briefly after hot bath or during allergy season
Daniel	Yes briefly after hot bath or during allergy season
C.E.M. Barbman	Yes briefly after hot bath or during allergy season
Kevin	None
Tusker	None
stephen bradley	None
J Smith	None
Kristen L. Ramsay	Yes briefly after hot bath or during allergy season
Erin	Yes, lasting hours
B	Yes briefly after hot bath or during allergy season
Duane Kaufman	None
Karen Connelly	None
Anaro Lexnon	None
Traci	None
lms18808	Yes briefly after hot bath or during allergy season
correybarone	None
Audrey Burns	None
Gollaher@gmail.com	Yes, lasting hours
John A Kuehn	None
saw2112	Yes
DemonRaven	None
eareitz	None
Alan	Yes briefly after hot bath or during allergy season
Hollyebullion@gmail.com	Yes
JenSea	sometimes
Denatonium	It’s skin writing. It depends on depth
Abstractdr3ams	Yes
André	Yes briefly after hot bath or during allergy season
DJValkyrie	Sometimes
Whynot	None
Etryon52	Yes briefly after hot bath or during allergy season
otis	None
JGDB	None
Klevine	I turn red but do not get welts
hanasoph	None
Chris1507	None
atj	None
23andmere	Only when stressed or overly warm
mshuleva	None
ladynajera	Yes, lasting hours
lorelai	Yes
mrshays44	Yes
Kaley White	None
mandy534475	None
Kosten.hazen	None
Takiwatanga	None
Tsgkaytee	Only when stressed or overly warm
maccam912	Yes briefly after hot bath or during allergy season
Dominika	Sometimes
Maria	I turn red but do not get welts