A spasm is a sudden, violent, involuntary contraction of a muscle or a group of muscles (including involuntary muscles such as in an artery, the colon, or the esophagus), attended by pain and interference with function, producing involuntary movement and distortion.

Symptom severities
Mild 3
None 2
What patients report taking for the purpose of treating Muscle spasm in left side of neck into shoulder
Cyclobenzaprine 2
ThermaCare Heatwraps 2
Baclofen 1
Flexeril 1
Heating Pad-Hot Packs 1
Hydrocodone 1
Ibuprofen 1
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