My body has coughing body since past More than 10 years like some days there is wet cough and some days there is nothing. I have sinus issue. One month ago I had very bad sinus block causing extreme headache which has been treated and solved in one week. But my phelgum has increased sometime it is brown color and sometimes it's clear color. I don't have any throat pain or fever or weight loss. Why phelgum issue is there for last 10years. Shown it physicians many times but they prescribed cough syrup which treats phelgum for some days.