Bronchitis, if left untreated, can lead to serious health complications, including difficulty breathing, pneumonia, and even respiratory failure. Without treatment, the infection may worsen, leading to more severe symptoms like chest pain, a high fever, and a persistent, dry cough. Additionally, bronchitis can cause long-term damage to the lungs, making it difficult to breathe and increasing the risk of other respiratory illnesses. People with underlying conditions, such as asthma, COPD, or heart disease, are particularly susceptible to the dangers of untreated bronchitis. In some cases, failing to seek treatment can even be life-threatening. It is important to seek medical attention as soon as possible, as early diagnosis and treatment can reduce the risk of complications.