Source: Tafsir al-Ahlam al-Kabir (Ibn Sirin)
A cough in a dream is a complaint. Whoever sees himself coughing is complaining about his superior or about something that pains him.
Source: Ta'tir al-Anam fi Ta'bir al-Manam (Al-Nabulsi)
A cough indicates worry and grief. It may also indicate illness.
Source: Al-Isharat fi Ilm al-Ibarat (Ibn Shahin)
A cough is interpreted as a complaint. Whoever sees himself coughing up blood is complaining about unlawful money.