cramping
cramp-ing
verb
Restricting movement or space, or causing a painful muscle contraction.
"The small desk was cramping his style."
noun
A sudden, painful, involuntary tightening or spasm of a muscle.
"She felt a sudden cramping in her calf."
Thesaurus
Synonyms: cramp, strangle, hamper, halter, spasm, muscle spasm, cramp iron