Adult pneumonia symptoms

Written by Yang Feng

Pulmonology

Updated on April 05, 2025

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The main clinical symptoms of pneumonia include cough, expectoration, asthma, chest pain, chills, high fever, etc. If the pneumonia patient has some complications from other systems, symptoms like nausea, vomiting, diarrhea, and dizziness may also occur. Once pneumonia is diagnosed, active antimicrobial treatment is necessary, and pneumonia can be cured. Additionally, for patients with low immunity or those who frequently suffer from respiratory diseases, annual influenza and pneumonia vaccinations can be administered for preventive measures.

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Written by Yuan Qing

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The difference between interstitial pneumonia and pneumonia

Interstitial pneumonia, also known as diffuse pulmonary interstitial fibrosis, mainly refers to a disease characterized by the replacement of the lung interstitium with some invisible fibrous tissues, leading to lung atrophy and difficulty breathing as the main manifestations. The pathological site of pneumonia is mainly in the alveoli and lung parenchyma, and patients mainly show symptoms such as coughing, expectoration, and fever, generally not experiencing difficulty breathing. Additionally, interstitial pneumonia and pneumonia have typical and distinct changes in imaging. Through imaging, it is basically possible to differentiate almost completely between interstitial pneumonia and pneumonia without the need for any special techniques.

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Written by Li Jiao Yan

Neonatology

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Symptoms of pneumonia cough in children

Pneumonia in infants commonly occurs in young children, especially those under two years of age. The onset of the disease is usually rapid, starting with symptoms of upper respiratory tract infections that gradually evolve into more pronounced respiratory symptoms. The cough is frequent, initially a dry, irritating cough, that progressively worsens as the disease advances. In cases of severe pneumonia, the cough may actually lessen. During the recovery phase, the cough gradually diminishes and rattling sounds can be heard in the throat due to mucus. After the mucus is cleared, there may still be occasional bouts of irritating dry cough, which will slowly subside.

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Written by Li Jiao Yan

Neonatology

1min 38sec

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Differential Diagnosis of Pediatric Pneumonia

Childhood pneumonia needs to be differentiated from other respiratory diseases such as bronchial foreign bodies, bronchial asthma, and pulmonary tuberculosis. A bronchial foreign body generally has a history of inhalation of foreign objects, sudden choking coughs, and a chest X-ray might indicate atelectasis or pulmonary emphysema. If the foreign body has been present for a long time, the disease course is prolonged and may lead to secondary infections, similar to pneumonia or concurrent with pneumonia. The differentiation of bronchial foreign body involves detailed medical history inquiries to check for inhaled foreign objects, then using symptoms and auxiliary examinations like chest X-rays for confirmation. Bronchial asthma, especially in children, might not always present with obvious wheezing attacks but rather persistent coughing. The X-ray might show increased and disordered lung markings and pulmonary emphysema, which can easily be confused with pneumonia. Typically, children with bronchial asthma have an allergic constitution and generally require pulmonary function tests and other auxiliary examinations to differentiate from pneumonia. Pulmonary tuberculosis generally occurs in those with a history of contact with tuberculosis patients. Their tuberculin skin test is positive, and X-rays may show features of tuberculosis lesions in the lungs, which can be used to differentiate from pneumonia.

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Written by Yang Feng

Pulmonology

40sec

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How many days does the pneumonia vaccine take effect?

Pneumonia is a common infectious disease of the respiratory system. For the elderly who are frail, infants and young children who repeatedly suffer from pulmonary infections, and adults with immune deficiencies, it is an option to get vaccinated against pneumonia. Generally, antibodies are produced in the body 2 to 3 weeks after vaccination, which may protect against most types of pneumococcal bacteria. Different pneumonia vaccines vary in the duration the antibodies last in the body, with most lasting about one year. For bivalent and trivalent pneumonia vaccines, the immune protection can last about five years.

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Written by Hu Xue Jun

Pulmonology

1min 6sec

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Can pneumonia be cured?

Can pneumonia be cured, and will there be any sequelae? Generally speaking, common pneumonia without complications can be completely cured. If pneumonia infection is detected, seek medical attention in a timely manner and treat it rationally under the guidance of a professional doctor, it generally will not leave sequelae or affect lung function. However, some complications of pneumonia, such as meningitis and pericarditis, may leave symptoms like headaches, dizziness, palpitations, and chest pain. Ordinary pneumonia might leave streaky shadows or irregular pleura on chest X-rays or lung CT scans, but these will not impact the human body. Patients who have previously been infected with tuberculosis may have calcification spots in their lungs, which is a normal phenomenon. Some people may experience sequelae after treatment, such as hearing loss caused by the use of antimicrobial drugs, and avascular necrosis of the femoral head occurring after SARS treatment; however, these are possibly side effects of the drugs, rather than sequelae of pneumonia.