I have only nail clubbing since of the birth. I didn t test chest X ECG or Eco test . No lung or heart related problems were identified. I didn t feel any breathing problem till now can i shot this problem. Specially I haven t these the symptoms and signs of concerning are : Breathing difficulty, Blood in the sputum, Prolonged fever, Cough, Chest pain, Shortness of breath, Altered bowel habits, Abdominal pain or distention, Loss of weight, Jaundice, Loss of appetite, Bleeding per rectum, Bluish discoloration of lips and fingers and I have not any difficulty and I am fine now. I am healthy situation in now. but, I read about nail clubbing it got me worried. 21 years old, male.