Halitosis from Human mouth is quite common; it may be caused by foods a person eat, poor oral hygiene, diseases, or other factors. There are many risk factors and causes for halitosis or bad breath, and even healthy people have bad breath on occasion. Oral malodor is common and can affect people of all ages. But in markets there are many vaccinations which cure bad smells which come from human mouth and homemade remedies also available. There are some causes of this problem and also discuss how to protect from this.

Reasons of bad breath

There are many factors which leads to bad smell from peoples  and others may notice someone has halitosis before the person does, so another person may tell him or her about their bad breath or give them a larger than normal personal space. The most obvious sign or symptom of bad breath is noticing an unpleasant smell coming from the mouth.

Food

Food is a primary source of bad odors that come from the mouth. Some foods, such as garlic, onions, spicy foods, some cheese, fish, and acidic beverages such as coffee can leave a lingering smell. Most of the time the odor is short lived. Other foods may get stuck in the teeth, promoting the growth of bacteria and dental plaques, which reasons of bad breath odor.

Tobacco Products

 Smoking and chewing tobacco can leave chemical substances that remain in the mouth and smoking can also affect other bad-health causes such as gum disease or oral cancers

Poor Oral Health

 Not regular brush or floss can harm human teeth and food particles remain in the mouth and this leads to odors in the mouth. Some gems can be harms the gum. Moreover, teeth related disease also form smells in human mouth.

Dry Mouth

 Dry mouth can also be a cause of bad breath. Saliva helps moisten and cleanse the mouth, and when the body does not produce enough saliva, it may result bad breath. Dry mouth may be caused by salivary gland problems, connective tissue disorders, medications, or breathing through the mouth.

Allergies

 Many medications used to treat allergies can cause dry mouth, another cause of halitosis. In addition, post-nasal drip is a common allergy symptom that can result in bad breath.

Mouth Infections

Cavities, gum disease, or impacted teeth may cause bad breath.

Other Causes

Although most of the time bad breath is caused by odor-causing bacteria, there are a numerous of other health conditions that may be contributing to the problem. Postnasal drip, respiratory and tonsil infections, diabetes, sinus problems, liver and kidney issues, as well as certain blood disorders can all cause bad breath.