What diseases should be differentiated from when a 3-year-old child coughs without sputum?

Cough is a complex disease. Newborns will also cough after being infected with viruses, and adults or the elderly will also have various types of coughs. Taking children as an example, coughing is called pediatric cough. The types of coughs can be divided into dry coughs, phlegm coughs, etc. The type can only be determined after diagnosis. A 3-year-old child's cough without phlegm can also be divided into coughs after a cold, and some are pharyngitis, etc. So what diseases should be differentiated from a 3-year-old child's cough without phlegm?

Clinically, most chronic dry coughs are allergic coughs, also known as cough variant asthma or allergic bronchitis.

The causes of allergic cough are complex, but mainly include two aspects, namely the constitution of patients with allergic cough and environmental factors. The patient's physical constitution, including subjective conditions such as "genetic quality", immune status, mental and psychological state, endocrine and health status, is an important factor in the patient's susceptibility to allergic cough. Environmental factors including various allergens, irritating gases, viral infections, residential areas, living conditions, occupational factors, climate, medications, exercise (hyperventilation), food and food additives, eating habits, social factors and even economic conditions may be more important causes of the occurrence and development of allergic cough. The increasing trend in the incidence of allergic cough is also related to the susceptibility caused by the patient's allergic constitution and environmental factors.

Laboratory tests must be summarized and analyzed based on the objective data obtained from medical history and physical examination, from which several possible diagnoses can be proposed, and then further consideration should be given to which actual laboratory tests should be performed to confirm the diagnosis. Therefore, in view of the dry cough and its associated symptoms, corresponding laboratory tests can be performed, such as blood routine, lung X-ray, laryngoscopy, etc.

Identification:

1. Pharyngitis

Chronic pharyngitis is a common pharyngeal disease, the most prominent symptom of which is an irritating dry cough. Patients experience itching and discomfort in the throat, and often have dry coughs to clear the throat. The symptoms are more obvious when speaking, and can be relieved after drinking water or swallowing. Most of them are secondary to infectious lesions of the upper respiratory tract, or are more common in frequent smokers, alcoholics, and those who engage in certain activities that expose them to harmful dust or gases.

Examination of the pharynx may reveal congestion of the pharynx. Many dilated capillaries and a small number of proliferating lymph follicles may be seen on the surface of the posterior pharyngeal mucosa. This is more common in the posterior pharyngeal mucosa and in people who are exposed to certain harmful dusts or gases.

2. Laryngitis

The main symptom is hoarseness, which often occurs intermittently in the early stages and occurs when there are more pronunciations. If the disease worsens, the hoarseness may become persistent, but it is rare for a person to not suffer from aphonia. The patient has a dry cough to relieve symptoms.

Laryngeal mucoscopy examination shows that patients with chronic simple laryngitis often show congestion of the laryngeal mucosa, loss of luster of the vocal cords, dilated blood vessels distributed on them, and increased mucus secretions; when the condition worsens and develops into chronic proliferative laryngitis, the mucosa is significantly thickened and dark red, with thickened and rounded edges, and it is often incompletely closed during pronunciation, and the laryngeal ventricular zone is often thickened due to compensatory activities; chronic atrophic laryngitis is rare, and yellow-green crusts are often coughed up after coughing, and there is a burning or pain in the throat.

What diseases should be differentiated from a 3-year-old child's cough without sputum? Normal coughs are mostly caused by a cold, and the characteristics of a cold are the most obvious among its symptoms. The probability of a child who is too young suffering from pharyngitis or laryngitis is small, but there is a chance of it occurring. When making a judgment, you need to observe the type based on the medical history. If it is just a simple cough without sputum, a lung examination is needed. B-ultrasound can diagnose the disease. Only after the disease is confirmed can the cough be controlled to avoid repeated and more complicated coughs.