Detox or Allergy

I have a question, how can someone know that their symptoms are due to detox process or a developed allergy/intoleration reaction to the oil.

I’m slightly intolerated to dairy but only if I consume many portions or have them on a daily basis. I never had a reaction to sesame however sesame oil is a concentrated form and could possibly cause some intoleration even if someone doesn’t have this reaction when eating nuts.

my main symtoms are mild flu-like symtoms, wheezing and nasal headaches.