Where does this come from, and can I check it?

Friction splits the epidermis and plasma seeps into the gap as a cushion. The figure is taken from MedlinePlus, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.

Is this really a human body fact?

Yes. It sits on the Human Body shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.

What else can I read about it?

The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.

Mondo Knows Facts

A blister is fluid trapped under dead skin

Friction splits the epidermis and plasma seeps into the gap as a cushion Repeated rubbing shears the upper skin layers apart from the layers below. Fluid from nearby vessels fills the space, lifting a roof of dead cells. The pocket cushions the raw tissue underneath and holds back dirt while new skin forms. It sits in Mondo's human body collection, one of 200 facts that each trace back to the reference below.

Where this comes from

MedlinePlus

Facts that can change over time are reviewed and updated. If something here looks wrong, Mondo would rather know than be confidently incorrect.

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Science trivia

More facts like this

Matchbox striking strips contain crushed glass powder for frictionAbrasive glass grit on box strips creates the friction heat needed to ignite match heads Repeated friction thickens the outer skin layerPressure prompts extra keratin production, building a tougher surface over time Each spinal nerve owns a strip of skinDermatomes are skin territories mapped to the single nerve root that serves them Skin loses collagen and elasticity with ageCollagen production in the dermis falls while existing fibres become fragmented Cold narrows the vessels in fingers and toesReduced skin blood flow keeps warm blood in the core at the cost of cold extremities Goosebumps are caused by tiny hair follicle muscles contractingArrector pili muscles pull skin hairs upright in response to cold or emotion

Tags: skin, blister, friction

A blister is fluid trapped under dead skin: the short answers

Where does this come from, and can I check it?: Friction splits the epidermis and plasma seeps into the gap as a cushion. The figure is taken from MedlinePlus, which is linked in full on this page. Every fact on Mondo Knows names its source rather than repeating an unsourced claim.
Is this really a human body fact?: Yes. It sits on the Human Body shelf, one of 2,600 sourced facts grouped into space, animals, the human body, history, science and more. Category pages collect every fact in the same field.
What else can I read about it?: The links under the fact point to a quiz, game, puzzle or calculator on the same subject, and the shelf below shows related facts. The wording here is original, and quoted phrases are marked as quotations.