What could be the main reason i get a twitch in my lower shoulder for months on and off? plus my eye gets a twitch most days now.what do i need??

Various causes: A muscle twitch is an small local involuntary contraction of muscle. It is usually not a symptom of a serious illness. Sometimes it occurs after muscular exertion.Tension or anxiety can cause twitching. Magnesium deficiency is another cause. For more information see: http://bit.ly/1rBtxRu

Tics: It is not uncommon that one will have a tic, or involuntary twitch, in a muscle. This can occur in any muscle, but most commonly seen in a twitch of an eyelid or facial muscle, a back muscle or in the legs. Increased stress is usually involved, e.g. anxiously waiting at a stoplight, or in a new social situation.