Thanks for using the forum. I am happy to address your questions, and my answer will be based on the information you provided here. Please make sure you recognize that this forum is for educational purposes only, and it does not substitute for a formal office visit with your doctor.
Without the ability to examine you and obtain a history, I can not tell you what the exact cause of your symptoms is. However I will try to provide you with some useful information.
Prolonged constant twitching of only part of the
faceFace pain and part of a limb could occur as part of many types of movement
disordersAdjustment disorder
Anorexia nervosa
Asperger syndrome
Autism
Autoimmune disorders
Bipolar disorder
Bipolar disorder
Bleeding disorders
Borderline personality disorder
Bulimia
Chronic motor tic disorder. The exact type depends on the exact appearance (what is described as a twitch could be many things), the patient's age, etc. Some possibilities include a
ticAbdominal aortic aneurysm
Abdominal mri
Abdominal wall surgery
Abortion - elective or therapeutic
Acne
Acne, cystic on the back
Acne, cystic on the chest
Acne, cystic on the face
Acoustic neuroma
Acoustic trauma
Acth disorderAdjustment disorder
Anorexia nervosa
Asperger syndrome
Autism
Autoimmune disorders
Bipolar disorder
Bipolar disorder
Bleeding disorders
Borderline personality disorder
Bulimia
Chronic motor tic disorder, dystonia (an abnormal movement characterized by an involuntary muscle
contractionsFetal heart and uterine contraction monitor
Fetal heart monitoring
Tension headache), seizures (such as one type of seizure called epilepsia partialis continua), and myoclonus (sudden jerks for which there are many causes).
There are many potential causes to all these types of abnormal movements; sometimes an identifiable cause is present, such as recent infection or a metabolic disorder, other types the condition is termed idiopathic: without an identifiable cause. Depending on the exact nature of the twitching and the cause, treatments are available for many of these types of abnormal movements.
Evaluation of these symptoms would best be by a neurologist.
Thank you for this opportunity to answer your questions, I hope you find the information I have provided useful, good luck.