As the infection worsens, complications include pneumothorax, or a collapsed lung, bronchiectasis, or the permanent narrowing of air passageways in the lungs, and hemoptysis, where your dog coughs up blood. (dogcare.dailypuppy.com)
Unlike some baby bottles with a venting system, Coddlelife bottles have a separate air passageway that is actually part of the... (pregnancymagazine.com)
However, Herxheimer - like reactions will never cause cardiac problems or irregularities, breathing difficulties (which were not present initially), constriction of air passageways, extreme swelling, or other severe and non-generalized symptoms. (silvermedicine.org)