Wouldnt a steroid (decadron) be more dangerous than helpful to help with inflamation after tooth extractions if i have an ongoing infection? wouldnt it make the infection more likely to spread ? should i decline the steroid during surgery?

I too would worry about it but my reading revealsthat it's common practice to prescribe corticosteroids to prevent or minimize post dental extraction inflammation. I'd follow the advice of your treating dentist or oral surgeon.

Don't decline, instead discuss. Medications are titrated depending on your signs and symptoms and influenced by your medical history and current medications. Discuss your questions with your practitioner. Trust his/her training and years of experience.