Also is there certain foods you should avoid when you have a tooth abscess?

Hard foods: Try to avoid chewing on it as well.

Tooth abscess: What's important is you being placed on an appropriate antibiotic and having that tooth treated as soon as possible to remove the cause of the infection (usually root canal therapy) and hopefully saving the tooth. You can eat whatever you'd like although eating hard foods may make the tooth more sore to pressure.

Keep in mind: Avoid hot and cold food and drinks and also avoid chocolates, honey and sweets when you have tooth abscess as it could worsen the infection.