 [ Symptoms ] should i be concerned for my son   white blood cell count and lymphocytes are low and monocytes are slightly high [ Disease ] i get bronchitis alot i get the pains too your muscles tense up when you cough that is what you are experiencing mine got so bad that when i felt a cough coming on i would grab and squeeze the area that was hurting so i would say to not worry about it it is just your body tensing up for the cough next time you cough pay attention to your body and you will notice how your entire body tightens up