Ms. Lien, 65, coughed for a week; doctors believe prolonged coughing could cause strong abdominal muscle contractions, rupturing small blood vessels and leading to hemorrhage.
Duyen, 33, developed bloodshot eyes after a five-minute severe coughing fit; doctors diagnosed a ruptured capillary causing subconjunctival hemorrhage in her right eye.
Ms. Nga, 50, experienced sudden bleeding in her left eye; during an examination, macular edema was also discovered, leading to medical intervention that restored her vision.
