Chiari malformation type 1 (Chiari 1 malformation) is the most common form of Chiari malformations and represents a range of structural abnormalities affecting the hindbrain, including the cerebellum, brainstem, skull base, and cervical spinal cord. It is defined by the downward displacement of the cerebellar tonsils through the foramen magnum. The main underlying problem in Chiari 1 malformation is the herniation of the tonsils, which leads to direct compression of neural structures at the foramen magnum and upper spinal cord, often disrupting cerebrospinal fluid (CSF) flow and sometimes resulting in syringomyelia. The condition was first described by Hans Chiari in the early 1890s.In homeopathy, Arnold–Chiari Malformation (ACM) is viewed as primarily stemming from the syphilitic miasm, which is associated with destructive, congenital structural defects - such as those seen in neural and skeletal maldevelopment. The sycoticmiasm plays a secondary role, reflecting features of tissue overgrowth and obstruction, such as crowding at the foramen magnum. The psoricmiasm has minimal influence, as it typically pertains to functional disturbances rather than congenital malformations. Homeopathy treats each case of Arnold–Chiari malformation with a holistic, individualized plan - addressing the whole person rather than isolated symptoms - and while it may help manage symptoms, it does not offer a universal cure, relying instead on tailored remedies determined through careful assessment.