 [ Symptoms ] my daughter has a cough for weeks can be violent at times and no other symptoms 3 visits to dr office and not better [ Disease ] unfortunately i do not know your daughter is age or medical history to be able to narrow down the hundreds of possible causes i did have a case once where a child aspirated a small piece of crayon resulting in a severe cough it took a bronchoscopy to find and remove it if your daughter has not had an x ray this should be ordered and perhaps it is time to see a pulmonologist lung specialist since her regular medical provider has not found the causereason for this violent cough