<s>[INST] I have an 11 yr old asthmatic male child (twin) who has complained of several muscle spasms in his arms over the past few days. Tonight they ve been coming regularly in his left arm and he had me feel them. I did not expect to be able to feel the twitching but I most definitely could. Is this common/normal? [/INST] in some cases of asthma.. due to side effects of asthmatic medications,, they will have low potassium levels which cause body / muscle pain.. kindly.. do serum electrolytes and if posstasium is low.. start taking potassium supplements.. you kid will be normal in 2 days </s>