Doctors categorize Chiari malformation into three types, depending on the anatomy of the brain tissue that is displaced into the spinal canal, and whether developmental abnormalities of the brain or spine are present. Chiari malformation type I develops as the skull and brain are growing.
Evening primrose oil is LIKELY SAFE for most people when used for up to a year. It can sometimes cause mild side effects including upset stomach, nausea, diarrhea, and headache. Pregnancy and breast-feeding: Taking evening primrose oil is POSSIBLY UNSAFE during pregnancy.
And some studies suggest that supplements that contain gamma-linolenic acid (GLA), including evening primrose oil, may be of some benefit to people with rheumatoid arthritis. But more research is needed on the use of evening primrose oil for both of these conditions. Evening primrose oil has also been used as a complementary treatment for some cancers. Again, there is not enough evidence to support such use.