Can you get poison if you have an abses in your mouth as IV had it a week &iv had diarrhoea &iv had treatment from my dentist. Iv been to the doctors.

Clarification. Any infection can spread and cause serious complications. It can even be life threatening. That's why it's important to treat all infections. One of the ways we do that is to prescribe antibiotics. Antibiotics can cause diarrhea and GI pain & upset. You also have to treat the cause of the infection. You should be discussing your symptoms and treatment with your dentist & md.
Poison ? I don't think your doctors would be poisoning you. Are you on antibiotics? That may have caused your gastrointestinal distress. Speak to your dentist and discuss your problem.