The inability to breathe automatically when thinking about breathing can be caused by overstimulation, neuritis and myasthenia gravis. 1. Excessive tension: When a person is too tense, the nerve center controlling breathing can be driven abnormally, and the more he or she thinks about breathing, the less he or she can control breathing. 2. Neuritis: If nerve inflammation leads to abnormalities in the nerve conduction pathways of the patient’s respiratory nerves, it will also reduce the control of breathing, and the patient will not be able to breathe automatically when he/she wants to breathe. 3. Myasthenia gravis: Patients with myasthenia gravis may experience weakness of the respiratory muscles, which can reduce the patient’s ability to breathe, resulting in the inability to breathe automatically the more they try to breathe. If you can’t breathe automatically when you want to breathe, and it’s getting more and more difficult to breathe, you should call the 120 emergency number in time to prevent asphyxiation.