Why is my 3-year-old son struggling with breathing?

Pneumonia is inflammation of lungs.. Viruses, bacteria and fungi can infect lungs. Cough, Fever, chest PAIN, shortness of breath occur.. Treatment is based on type of pneumonia.. Antibiotics, antivirals, and antifungals may be used.. Rest and HYDRATION advised. Prevention includes vaccination and HANDWASHING. Seek medical attention if symptoms persist...

When experiencing a persistent cough, you may consider consulting with a primary care physician, such as a general practitioner or family doctor, as they can evaluate your symptoms, conduct an initial examination, and provide guidance.

Sports if you are asthmatic and lack of inhaler can turn out to be a dangerous affair. Asthma is a disease that can cause breathing difficulties, coughing, and compactness of the chest among other things. Physical activities can provoke an asthma attack. In your situation, it would be dangerous to do track and field without an inhaler. Warn your parents or school nurse about your asthma and request them to help you get an inhaler before beginning track and field. 

Fever and cough are typically part of the body's natural defense against infection. When you get wet in the rain, your body gets cold, which makes it a lot easier to catch a cold. Keep it warm, drink a lot of fluids, get some rest, and you can also take some over-the-counter fever medicine if you like. If your symptoms become more severe or worsen, visit a doctor.