Weakness, frequent coughs and colds, and fainting can have various causes. These symptoms might indicate low iron levels in your blood, known as anemia. Feeling tired or light-headed are common sign of iron deficiency. You should eat iron-rich foods like spinach, lentils, and meat, drink plenty of water, and rest when needed. If these steps don't help after some time, seek medical advice as soon as possible, as it could be something serious that needs urgent attention.

A cough that has lasted for 2 years can be a serious issue that we need to investigate. It could be attributed to several causes such as asthma, allergies, or even acid reflux. Other symptoms such as chest pain or difficulty breathing might give us clues. It's essential to go to a doctor for proper assessment and treatment. Don't postpone, as controlling the main issue can promote the relief of that intractable cough. 

An HRCT scan, recommended by your doctor, allows them to view your body and identify the possible cause of your shortness of breath. This scan can reveal issues like infections, inflammation, or lung scars. Based on the results, your doctor will suggest the most suitable treatment, such as medications or other therapies. 

Ingesting bleach may cause these effects by irritating your respiratory and digestive systems. It’s risky and should be treated as a medical emergency. Always remember that bleach is harmful if swallowed and could injure your internal organs in the future.

L-arginine can assist certain individuals in their breathing, but for those with asthma, it might not be the optimal choice. L-arginine can set off asthma attacks in some people, rendering one to gasp more. It is crucial to consult your physician before commencing any novel supplement, particularly if you have asthma.