People push your buttons because they know they can, regardless of whether theyâre aware of it. What theyâre looking for is a negative reaction; they want you damaged and on the defensive, for whatever reason.
Horner syndrome is caused by damage to a certain pathway in the sympathetic nervous system. The sympathetic nervous system regulates heart rate, pupil size, perspiration, blood pressure and other functions that enable you to respond quickly to changes in your environment.
Horner syndrome usually affects only one side of the face. Common signs and symptoms include: 1  A persistently small pupil (miosis). 2  A notable difference in pupil size between the two eyes (anisocoria). 3  Little or delayed opening (dilation) of the affected pupil in dim light.