|"There are plenty of eye-witness accounts. Just because you're so narrow-minded you need to have everything shoved under your nose before you–"
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Bubotuber pus is the liquid found in the swellings of the magical Bubotuber plant. It is very valuable for its acne-ridding qualities. It is a thick, yellowish-green liquid and smells strongly of petrol.
Despite retaining healing powers, when undiluted it can cause painful, large, yellow boils to form immediately on the skin, and dragon-hide gloves are recommended to be worn while handling it. It is also an excellent remedy for the more severe cases of acne, and is recommended in preference to spells, which can backfire and cause side effects as extreme as nose loss, which happened to Eloise Midgen.
Bubotuber pus is collected by squeezing the swellings on the plant, and catching the pus that bursts out in bottles. In 1994, the Fourth years attending Hogwarts collected Bubotuber pus in bottles during Herbology with Professor Sprout. When the students were squeezing the swellings, it was described as "disgusting, but oddly satisfying."
In the same year, Hermione Granger was sent an envelope from an unknown person, who believed the rumour that she had relationships with both Harry Potter and Viktor Krum, as reported by Rita Skeeter. This caused yellow boils to form on her hands, which made it looked like she was wearing thick, knobbly gloves.
- Harry Potter and the Philosopher's Stone (video game) (Mentioned on a Famous Wizard Card)
- Harry Potter and the Chamber of Secrets (video game) (Mentioned on a Famous Wizard Card)
- Harry Potter and the Goblet of Fire (First appearance)
- Harry Potter and the Goblet of Fire (video game)
- Harry Potter and the Half-Blood Prince (Mentioned only)