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    The content on this page is not current guidance and is only for the purposes of the consultation process.

    Indications and current treatment

    CSDH is characterised by a pathological collection of blood in the subdural space, and usually has an insidious onset and progression. It may begin forming several days or weeks after bleeding initially starts. Bleeding is usually caused by a head injury, which may be minor in nature.

    People who are asymptomatic or have minor symptoms with smaller haematomas are usually offered conventional treatment with careful monitoring and medical management. In contrast, people who have more severe symptoms and larger haematomas, and who have acceptable surgical risks, are generally offered burr hole surgery or a craniotomy.