7 of the Strangest Allergies

From SciShow.

When you think of allergies, the first thing that comes to mind is probably seasonal allergies, but there are a handful of strange allergies can be much harder to avoid than pollens.

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Sources:
Sources:
https://www.researchgate.net/publication/276147913_Physical_urticaria_Review_on_classification_triggers_and_management_with_special_focus_on_prevalence_including_a_meta-analysis
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2492902/
http://www.pcds.org.uk/clinical-guidance/urticaria-physical-urticaria
http://www.merckmanuals.com/professional/dermatologic-disorders/approach-to-the-dermatologic-patient/urticaria
http://www.merckmanuals.com/professional/immunology-allergic-disorders/allergic,-autoimmune,-and-other-hypersensitivity-disorders/overview-of-allergic-and-atopic-disorders
https://emedicine.medscape.com/article/762917-overview
http://abcnews.go.com/Health/AllergiesNews/story?id=7401149&page=1
https://mosaicscience.com/story/why-do-we-have-allergies/

dermographism
https://www.dermnetnz.org/topics/dermographism/
https://emedicine.medscape.com/article/1050294-overview
https://www.ncbi.nlm.nih.gov/pubmed/16405609

vibration
https://ghr.nlm.nih.gov/condition/vibratory-urticaria#genes
https://www.nih.gov/news-events/news-releases/nih-scientists-discover-genetic-cause-rare-allergy-vibration

water
https://rarediseases.info.nih.gov/diseases/10901/aquagenic-urticaria
http://www.bbc.com/future/story/20160915-the-woman-who-is-allergic-to-water
https://www.sciencealert.com/here-s-what-happens-if-you-develop-an-allergy-to-water
http://onlinelibrary.wiley.com/doi/10.1111/j.1525-1470.2012.01801.x/abstract

exercise
https://emedicine.medscape.com/article/886641-overview#showall
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3020292/
https://www.aafp.org/afp/2001/1015/p1367.html

semen
https://clinicalmolecularallergy.biomedcentral.com/articles/10.1186/1476-7961-6-13
https://www.uptodate.com/contents/allergic-reactions-to-seminal-plasma
http://www.issm.info/sexual-health-qa/what-is-a-sperm-allergy/
http://www.tandfonline.com/doi/abs/10.3810/pgm.2011.01.2253
http://www.annallergy.org/article/S1081-1206(13)00005-7/abstract
http://www.allergologyinternational.com/article/S1323-8930(17)30110-7/fulltext
https://sciencealert.com/rare-post-orgasm-illness-is-real-and-warrants-further-research-study-finds-pois-semen
https://rarediseases.info.nih.gov/diseases/10809/postorgasmic-illness-syndrome
http://www.jsm.jsexmed.org/article/S1743-6095(15)33455-X/fulltext
https://www.nature.com/articles/nrurol.2011.17

progesterone
https://rarediseases.info.nih.gov/diseases/9139/autoimmune-progesterone-dermatitis
https://rarediseases.info.nih.gov/diseases/9139/autoimmune-progesterone-dermatitis/cases/33524
https://www.medscape.com/viewarticle/712365
http://www.annallergy.org/article/S1081-1206(10)61838-8/abstract
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3423662/
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC509283/
https://www.dermnetnz.org/topics/autoimmune-progesterone-dermatitis

Image Sources:
https://commons.wikimedia.org/wiki/File:Skin_writing01.jpg
https://upload.wikimedia.org/wikipedia/commons/a/a0/SMCpolyhydroxysmall.jpg
https://en.wikipedia.org/wiki/Histamine#/media/File:Histamine.svg
https://commons.wikimedia.org/wiki/File:PSA_KLK3_PDB_2ZCK.png
https://en.wikipedia.org/wiki/Progesterone#/media/File:Progesterone-3D-balls.png