Hello, I understand your problem. Halitosis means bad breath. This has many causing factors commonest of them are tobacco chewing and smoking, having less amount of water, any throat infection such as laryngitis, pharyngitis, tonsillitis, cough and cold infections may cause this, dry mouth etc.. To avoid halitosis is to sort out above mention factors. If you are not having enough eater then you need to take 3-4 liters of water a day. Avoid smoking or chewing of tobacco. If you have any throat infection then consult a ENT specialist at once. Thank you