I have bad breathing problems

What is the first step of treating your bad mouth breath ?
first step is to figure out what is the cause of your medical condition which could be :
1. unsuitble life style such as : smoking , smelly food , heavy spiced food , dirty teeth 
2. teeth issue : infection , dirty teeth implants , root issues 
3. throat area and Sinusitis 
4. lung infections or medical conditions 
5. stomach infections  or medical conditions 
6. medications side effect
What is the next step ?
1. check out your symptoms 
2. consider consulting the needed doctor speciality , which are :
- dental 
- ENT
- internal medicine 
How to treat your bad breath ?
- first , if you have any obvious cause for your case and treat it 
- pay attention to your teeth and use mouth washs always 
- pay attention to your diet and avoid any smelling or inconveiniant food