When dysbiosis happens in your GI tract, it’s typically the result of:

• a dietary change that increases your intake of protein, sugar, or food additives
• accidental chemical consumption, such as lingering pesticides on unwashed fruit
• drinking two or more alcoholic beverages per day
• new medications, such as antibiotics, that affect your gut flora
• poor dental hygiene, which allows bacteria to grow out of balance in your mouth
• high levels of stress or anxiety, which can weaken your immune system

Dysbiosis is also common on your skin. It can be caused by exposure to harmful bacteria or an overgrowth of a single type of bacteria.

For example, Staphylococcus aureus bacteria can grow out of control and lead to a staph infection. 

Your symptoms will depend on where the bacteria imbalance develops. They may also vary based on the types of bacteria that are out of balance.

Common symptoms include:

• bad breath (halitosis)
• upset stomach
• nausea
• constipation
• diarrhea
• bloating
  
• chest pain
• rash or redness
• fatigue
• having trouble thinking or concentrating
• anxiety
• depression