When you think of allergies, you likely think of pollen, cats, or maybe peanuts. But did you know there are some people who suffer from extremely strange allergies such as the sun, water, or exercise? Join Michael Aranda for a fascinating episode of SciShow all about the world of strange allergies!
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Sources:
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dermographism
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vibration
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water
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exercise
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https://www.aafp.org/afp/2001/1015/p1...

semen
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progesterone
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https://rarediseases.info.nih.gov/dis...
https://www.medscape.com/viewarticle/...
http://www.annallergy.org/article/S10...
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Image Sources:
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