There is a possibility of self-healing for the tooth to inhale the cool pain, but there are more causes for this symptom, and specific analysis is needed for the specific problem. If it is considered to be tooth defect or deep caries, it can be recovered after treatment and generally cannot be self-healed. If the consideration is pulpitis, specific analysis is needed. Clinically, pulpitis is generally divided into reversible pulpitis and irreversible pulpitis. Reproducible pulpitis is equivalent to pulp congestion, which is a kind of pulpitis with mild lesions, and pain can be caused by airflow fluctuation, hot and cold stimulation, etc. When the stimulation is removed, the pain can mostly disappear by itself. Irreducible pulpitis is a generic term for a variety of pulpitis that is difficult to distinguish from the nature and extent of the inflammatory lesions, including acute, chronic, and retrograde pulpitis, which have different clinical characteristics, but all require removal of the pulp if the lesions are to be eliminated, are usually more severe, and generally do not heal on their own. Regardless of the type of pulpitis, treatment should be actively pursued in the early stages to prevent progression and not to rely too much on the body’s own ability to heal itself, so as not to delay the disease and miss the best time for treatment.