If I use sudafed I tend to get restless leg syndrome and feel like I want to jump out of my skin. Is this an allergy to it?
Not an allergy. Just a common side effect.
Probably side effect. It sounds more like a side effect. Sudafed can be stimulating and too much stimulation can cause what you are experiencing.
My head is extremely restless and I have movement of the head and arms right when I'm going to sleep I have had restless leg syndrome in the past?
Restless. The restlessness of your heads and arms may be part of your restless legs syndrome.