Thanks for your question on Health Care Magic.
I can understand your concern.
Possibility of muscular spasm due to
muscle strain is more in your case.
Muscular spasm is actually protective reflex to prevent further damage.
Whenever body is in awkward position, muscle damage is likely.
And so muscle spasm occurs. This is felt as muscle tightening and pain.
Your symptoms occur only after awkward position or exercise.
So this clearly indicates muscular strain and spasm.
So avoid awkward position and painful movements. Avoid heavyweight lifting and strenuous exercise. Avoid bad postures in sleep.
Apply warm water pad on affected areas. Take painkiller and
muscle relaxant drugs whenever you are having pain.
Hope I have solved your query.
Wish you good health. Thanks.