Commonly, tooth abscess is known to start with a toothache. So, if your sore and throbbing tooth is left untreated, it can become infected, and then if you choose to avoid the problem, the infection can further spread to other parts of your body. To ensure your tooth abscess is spreading, you must know all the symptoms of tooth infection and then signs of infection spreading in the body. 

Symptoms of Tooth Infection
Here are some common symptoms of an infected tooth: 

• There is constant pulsating pain in the ear, jawbone, and neck (generally on the same side as the toothache). 
• Cheek swelling
• Fever
• Lousy breath & unpleasant taste in the mouth 
• Frequent sensitivity to cold and hot foods and drinks. 
• Pain that worsens when you lie down. 
• Continuous throbbing tooth pain 
• Sensitivity to pressure in the mouth. 

Symptoms of Tooth Infection Spreading in the Body
When an infected tooth is not well-treated or entirely ignored, the infection can spread elsewhere in your body, which is probably life-threatening. Check out the following symptoms that the tooth infection spread includes: 

• Continuously feeling unwell 
• Dizziness and headache. 
• Fever 
• Sweating and chills
• fatigue 
• Frequent dehydration
• Dark urine 
• Increase in heart rate 
• The constant increase in heart rate and breathing 
• Face swells 
• Skin flushing 
• Swelling impedes breathing and swallowing. 
• Vomiting and diarrhea.
• Rapid pulse rate

How Does a Tooth Get Infected? 
Generally, a tooth is infected when bacteria enter the tooth through a crack, chip, or cavity. Moreover, your risk factor for a tooth infection increases if you have: 

• Bad oral hygiene, including not brushing your teeth twice a day and not flossing 
• Constant dry mouth usually results from aging or as a side effect of specific medications.
• Consuming a high sugar diet, like eating sweets and drinking soda. 

Therefore, not all toothaches should be associated with severe health concerns. But if you’re undergoing a constant toothache, it’s better to consult a trusted dentist to get reliable treatment before it gets worse.