Editing Subdural hematoma (section)

===Risk factors===
Factors increasing the risk of a subdural hematoma include very young or very old [[senescence|age]]. As the brain shrinks with age, the [[subdural space]] enlarges and the [[vein]]s that traverse the space must cover a wider distance, making them more vulnerable to tears. The elderly also have more brittle veins, making chronic subdural bleeds more common.<ref name="Downie" /> Infants, too, have larger subdural spaces and are more predisposed to subdural bleeds than are young adults.<ref name="wagner" /> It is often claimed that subdural hematoma is a common finding in shaken baby syndrome, although there is no science to support this.<ref name=":1" /> In juveniles, an [[arachnoid cyst]] is a risk factor for subdural hematoma.<ref>{{Cite journal |vauthors=Mori K, Yamamoto T, Horinaka N, Maeda M |date=September 2002 |title=Arachnoid cyst is a risk factor for chronic subdural hematoma in juveniles: twelve cases of chronic subdural hematoma associated with arachnoid cyst |journal=Journal of Neurotrauma |volume=19 |issue=9 |pages=1017–1027 |doi=10.1089/089771502760341938 |pmid=12482115}}</ref>

Other risk factors include taking blood thinners (anticoagulants), long-term [[Alcohol use disorder|excessive alcohol consumption]], [[dementia]], and [[cerebrospinal fluid leak]]s.<ref name=":2">{{Cite journal |display-authors=6 |vauthors=Beck J, Gralla J, Fung C, Ulrich CT, Schucht P, Fichtner J, Andereggen L, Gosau M, Hattingen E, Gutbrod K, Z'Graggen WJ, Reinert M, Hüsler J, Ozdoba C, Raabe A |date=December 2014 |title=Spinal cerebrospinal fluid leak as the cause of chronic subdural hematomas in nongeriatric patients |journal=Journal of Neurosurgery |volume=121 |issue=6 |pages=1380–1387 |doi=10.3171/2014.6.JNS14550 |pmid=25036203 |s2cid=207731566 |doi-access=free}}</ref>