Chest pain
Dyspnea
Anxiety
Tachypnea
Tachycardia
Hyper resonance of the chest wall on the affected side
Diminished breath sounds on the affected side
Whereas late findings includes
Decreased level of consciousness
Tracheal deviation toward the contralateral side
Hypotension
Distension of neck veins (may not be present if hypotension is severe)
Cyanosis