How to determine whether a child's cold is caused by a virus or bacteria

Written by Quan Xiang Mei

Pediatrics

Updated on January 05, 2025

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When determining whether a child's cold is caused by a viral infection or a bacterial infection, you can take the child to the hospital for a routine blood test. In most cases, it is caused by a viral infection. Combined with the routine blood test, if there is an increase in white blood cell count and neutrophil count, it usually indicates a bacterial infection.

If the white blood cell count is normal, or low, along with an increase in lymphocyte count or percentage, it usually indicates a viral infection. Alternatively, combining this with a C-reactive protein test, if the C-reactive protein level significantly multiplies, then it indicates a bacterial infection.

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Written by Zeng Hai Jiang

Pediatrics

41sec

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Will children with colds have recurrent low-grade fever?

Children with a cold may experience recurrent low fevers. In children, colds are generally caused by viral infections, such as rhinoviruses, common coronaviruses, etc. The symptoms include fever, runny nose, sneezing, coughing, sore throat, etc., and the duration of the illness is mostly three to five days, usually not exceeding a week. Therefore, during the course of the illness, the symptoms of a cold may recur. During the illness, fever-reducing measures are taken, such as physical cooling and medication. However, after the fever subsides, it may recur, which is a normal phenomenon.

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Written by Yan Xin Liang

Pediatrics

53sec

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How should a child's cough be treated after a cold?

After catching a cold followed by coughing, this is often due to viral or bacterial infections leading to pharyngitis, bronchitis, or pneumonia that cause coughing. Under this circumstance, the initial treatment is anti-infection. If it is considered a bacterial infection, then sensitive antibiotics should be added either orally or intravenously; if a viral infection is considered, then the primary treatment is symptomatic. For instance, taking some expectorant and cough suppressant medications, including Western or proprietary Chinese medicines. Concurrently, nebulizer inhalation can be administered to achieve expectoration, spasm relief, and cough suppression. Additionally, intravenous cough suppressants, enhancing back patting, and drinking more warm water can help dilute sputum and promote its expulsion among other treatments.

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Written by Quan Xiang Mei

Pediatrics

1min 27sec

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What to do if a child has a cold and is short of breath?

There are two common causes of shortness of breath in children with colds, and the corresponding treatments are as follows: First, shortness of breath in children with colds is mainly due to respiratory obstruction caused by cold symptoms, leading to blockages in the nasal mucosa. This can easily lead to breathing difficulties, so shortness of breath occurs. We can use warm, damp towels or drop vitamin AD drops into the nasal cavity, among other methods. A warm, damp towel can be placed near the nasal cavity, and the principle of water vapor evaporation can effectively alleviate the blockage of the nasal mucosa. Dropping vitamin AD drops into the nasal cavity can also effectively moisten and lubricate the nasal mucosa, relieving nasal blockages and thus improving symptoms of shortness of breath from a cold. The second cause of shortness of breath from a cold is due to myocarditis or cardiac damage following a viral cold. For mild cases, oral medications that nourish the heart muscle should be administered for treatment, and children must ensure they rest and avoid strenuous activity. For severe cases, intravenous infusions and medications that nourish the heart muscle are needed for treatment. (Please follow medical advice when using medications.)

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Written by Yan Xin Liang

Pediatrics

53sec

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What to do for quick relief of nasal congestion in children with a cold?

A minor cold with nasal congestion is likely caused by a viral infection leading to swelling of the nasal mucosa, and thus, blocking the nasal passages. For quick relief, we can initially take oral medications such as children's acetaminophen-diphenhydramine granules, etc., which can promote the contraction of the nasal mucosa. Additionally, antiviral oral solutions can be taken for antiviral treatment. Locally, a 3% sodium chloride solution can be used for nasal drops to promote the contraction of the nasal mucosa, or physiological seawater nasal drops can also be used for the same purpose. Furthermore, physiological saline can be used to wash the nasal cavity, and then a nasal aspirator can be used to clean the secretions inside the nasal cavity, which also helps to clear the nasal passages.

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Written by Quan Xiang Mei

Pediatrics

57sec

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How to treat a child's cold and cough?

For upper respiratory infections in children causing colds and coughs, the treatment approach should vary based on the child's age, as well as the severity and duration of the illness. For mild cases with less severe symptoms, treatment can be administered at home including frequent hydration, drinking plenty of water, and symptomatic oral administration of expectorants and cough suppressants. If the child's cold and cough symptoms are more severe, with significant coughing and phlegm, and are even affecting the child's sleep, it is typically recommended for parents to take their child to the hospital for blood tests. These tests may include a complete blood count, Mycoplasma testing, or a C-reactive protein test, to identify the specific cause of the cold and cough, and to enable targeted treatment. (Note: The use of medication should be under the guidance of a professional doctor.)