Symptoms Make an Appointment Refer a Patient Ask a Question Reviewed by Franziksa J. Rosser, MD, MPH (December 01, 2016) What Are Common Symptoms of Croup? Common symptoms of croup include a barking sounding harsh cough, a hoarse voice and stridor (a harsh sound from the windpipe while breathing in). These symptoms are typically caused by swelling in the throat and windpipe (trachea). Symptoms are worse in the evening and at night. Croup may last from several days to a week or more. If croup begins to worsen, these symptoms can intensify, and new symptoms can arise. Symptoms of worsening croup may include: Increased stridor Skin pulling in below the neck or between the ribs while breathing in (retractions) Trouble talking Blueness around the lips or nail beds (cyanosis) Drooling High fever Having trouble breathing in general. If your child has any of these symptoms, it is important to seek medical care right away. Treatment Clinical Trials For more than 100 years, National Jewish Health has been committed to finding new treatments and cures for diseases. Search our clinical trials.