1 Leber's hereditary optic neuropathy (LHON). 2  Particularly prevalent among males, this type of inherited optic neuropathy can affect even carriers who don't have other symptoms but do have a degree of color blindness. 3  Red-green color vision defects primarily are noted with this condition. 4  Kallman's syndrome.
This medical symptom information shows the various types of Fever, and other related symptoms or conditions, including their causes and diagnosis. 1  Chills. 2  FUO. 3  Low-grade fever. 4  Prolonged fever. 5  Mild fever. 6  High fever. 7  Very high fever. 8  Recurrent fever.
Most fevers are caused by viral or bacterial infections, but they can also be caused by toxins, cancers or autoimmune diseases. A fever is just a symptom of illness, not an illness itself. When an otherwise healthy person has a fever because of an illness, it is extremely unlikely to cause brain damage. Even febrile seizures, which occur in children, do not cause any permanent damage. The time to be concerned about a high fever is when it is not caused by an illness, but because of overheating.