What you're asking for is hard to find. Our knowledge of early medieval medicine, between 410 and the year 1000, is dependent on a series of manuscripts that are either original Old English works or works that have been translated from Latin into Old English.
I would recommend starting with the work of Peregrine Horden. Here are a few citations. I particularly like the last one (“What’s Wrong”) because Horden really takes you through questions that scholars have asked about medicine and how he evaluates them. Also, it’s a
heck of an entertaining read.
Horden, Peregrine. “Introduction.”
In The Body in Balance: Humoral Medicines in Practice, edited by
Peregrine Horden and Elisabeth Hsu, 1–21. Epistemologies of Healing 13. New
York: Berghahn Books, 2013.
———. “Mediterranean Plague in the
Age of Justinian.” In The Cambridge Companion to the Age of Justinian,
edited by Michael Maas and Michael Maas, 134–60. Cambridge: Cambridge
University Press.
———. “The Millennium Bug: Health and
Medicine around the Year 1000.” Social History of Medicine 13, no. 2
(2000): 201–19. https://doi.org/10.1093/shm/13.2.201.
———. “What’s Wrong with Early
Medieval Medicine?” Social History of Medicine 24, no. 1 (2011): 5–25. https://doi.org/10.1093/shm/hkp052.
On Anglo-Saxon medicine broadly:
Voigts, Linda E. “Anglo-Saxon Plant
Remedies and the Anglo-Saxons.” Isis 70, no. 2 (June 1, 1979): 250–68. https://doi.org/10.2307/230791. This article is old now, but I still think it is a great introduction to early medieval
books of medicine, based on the important three: Lacnunga, Bald’s Leechbook and
the Leechbook III.
Bald’s Leechbook and the Leechbook III (mid-10th century) are both bound in
British Library Royal 12 D XVII. Their extensive bibliography is on their web
page: https://www.bl.uk/catalogues/illuminatedmanuscripts/record.asp?MSID=6548

Lacnunga (first or second quarter of the tenth century) is bound with the Herbarium of (pseudo-) Apuleius, translated into Old English. That manuscript is British Library Harley 585: https://www.bl.uk/manuscripts/FullDisplay.aspx?ref=Harley_MS_585

These manuscripts have extensive bibliographies, some of which the British Library cites on their web cite.

A few years ago, a recipe for eye salve from Bald's Leechbook was replicated and tested, and was found to be strongly antibacterial in vitro. It's interesting, a neat collaboration between an Old English scholar and a chemist. https://www.bbc.com/news/uk-england-nottinghamshire-32117815

Enjoy!

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