The twitch in your shoulder is just a twitch it does not hurt you at all:>
right shoulder
what causes the left shoulder to swell
cutaneous muscle
French food.
summation
There are many causes of gas and diarrhea, but the right shoulder pain is most likely "referred pain" due to the stomach distress. The phrenic nerve is involved... I've also had right shoulder pain after my c-section, and the doctor explained how it was due to the phrenic nerve getting irritated and extending the pain to the right shoulder.
Probably a trapped nerve.
A twitch is used to release endorphins into the horse's bloodstream by pinching either the muzzle or loose skin on the shoulder or neck. The endorphins go to the brain and help calm the horse down.
There are a number of things that could cause your twitch on the right side of your head. It could be a nervous twitch for example.
This is not a common cause of eyelid twitch if you'd like to see a list of causes and their treatments check the link below.
latissimus dorsi
Shoulder bone dislocation or abnormal grown of shoulder bone. Check it with docs