<s>[INST] hi My son 22 years old and been having issues with his neck for more than a month. He has stiff neck , limited range of motion , blurry vision . MRI and blood test shows nothing wrong. What it can be? [/INST] HIT hank for asking to ChatDoctorI really appreciate your concern for your son, this could be muscular spasm and this would come around with the muscle relaxant, if I would be his doctor then I would treat him with the following treatment, 1) Tab Acetaminophen one tab three times in day2) Tab Chlorzoxazone one tab three times in day3) Tab Chlorodiazepoxide one tab three times in day hope this information helps you have a good day. </s>