Dystonia affects different people in different ways. Muscle spasms might:  Begin in a single area, such as your leg, neck or arm. Focal dystonia that begins after age 21 usually starts in the neck, arm or face. It tends to remain focal or become segmental. Occur during a specific action, such as writing by hand. Worsen with stress, fatigue or anxiety. Become more noticeable over time.  Areas of the body that can be affected include:  Neck (cervical dystonia). Contractions cause your head to twist and turn to one side, or pull forward or backward, sometimes causing pain. Eyelids. Rapid blinking or spasms cause your eyes to close (blepharospasms) and make it difficult for you to see. Spasms usually aren't painful but might increase when you're in bright light, reading, watching TV, under stress or interacting with people. Your eyes might feel dry, gritty or sensitive to light. Jaw or tongue (oromandibular dystonia). You might experience slurred speech, drooling, and difficulty chewing or swallowing. Oromandibular dystonia can be painful and often occurs in combination with cervical dystonia or blepharospasm. Voice box and vocal cords (laryngeal dystonia). You might have a tight or whispering voice. Hand and forearm. Some types of dystonia occur only while you do a repetitive activity, such as writing (writer's dystonia) or playing a specific musical instrument (musician's dystonia). Symptoms usually don't happen when your arm is at rest. 
dystonia affects people ways  muscle spasms might:  begin single area  leg  neck arm  focal dystonia begins age 21 starts neck  arm face  tends remain focal segmental  occur specific action  writing hand  worsen stress  fatigue anxiety  noticeable time   areas body can affected include:  neck (cervical dystonia)  contractions cause head twist turn side  pull forward backward  causing pain  eyelids  rapid blinking spasms cause eyes close (blepharospasms) difficult see  spasms aren't painful increase you're bright light  reading  watching tv  stress interacting people  eyes feel dry  gritty sensitive light  jaw tongue (oromandibular dystonia)  experience slurred speech  drooling  difficulty chewing swallowing  oromandibular dystonia can painful occurs combination cervical dystonia blepharospasm  voice box vocal cords (laryngeal dystonia)  tight whispering voice  hand forearm  types dystonia occur only repetitive activity  writing (writer's dystonia) playing specific musical instrument (musician's dystonia)  symptoms don't happen arm rest
dystonia