Hi welcome to HCM

Dear polution is the main cause of falling sick and difficulty in breathing . By now you must have realised this fact ?

Adopt Exercise to Breathe Easier .Weak muscles need more oxygen, so you can become short of breath just inhaling or just moving . Exercise changes that. When your muscles are stronger, daily activities are easier .
Yoga & pranayam - Deep Breathing Inhale - Hold - Exhale - Hold , for 2 seconds each , repeat 15 times .
Always breath thru nose .
Anulom Vilom - close your right nostril with your thumb ,inhale from left nostril , Hold for 2seconds ,Exhale from right nostril ,close your left nostril with your thumb , Hold for 2 seconds and Inhale from right nostril . this Repeat 10 times .
Kapalbhatti - Exhale with slow force , only throw out your breath , all doing regularly will further strengthen your mscles .
If you haven't been active lately, check with your doctor before starting an exercise .
A balanced diet which include all essential nutrients is equally important .
Peanut butter can pump up your intake of both calories and protein. Protein is important at every meal for people with breathing problem. Good sources include eggs, lean meat, fish, poultry, legumes, and nuts .
Crushed Garlic ,ginger with honey , lemon juice with warm water with a pinch of salt and black pepper
Vitamin B6 and Vitamin B12 are very important nutrients to treat asthma decreasing the inflammation in the lungs.
Vitamin C Is needed to fight infection, increase the amount of oxygen and reduce inflammation. Lemon juice and amla are the best source of vit C .
and also a level spoon of turmeric powder with milk at bed time help boosting immune system .
Avoid milk and milk products, substituting other calcium sources.
Avoid processed foods carbs , sugar , fried ,fast foods , Tea , coffee ,alcohol and smoking , stress , sleeplessness and Constipation all will produce biochemical and metabolic conditions in your body that will decrease your immunity.
So avoiding is definitely the first step in the right direction to detoxing the body, boosting the immune system .

Always drink plenty of water to detoxify & keep your respiratory tract secretions more fluid.
Medical treatment suggested by your doctor can be complemented using a variety of alternative therapies. Most of these therapies or home remedies focus on strengthening your immune system so that you can overcome your problem.
Regular check ups from your proffesoinal are recommended .

Hope this helps solves your query .Take care .All the best .Get well soon.

Don't hesitate to come back in case of any further query .