Hi, im 28 years old and my rheumatologist is suspicious for psoriartic arthritis. both knee's are swelling and my spine hurts too. what do you think is it right ? and after inflamatory period will i get back to normal life?

Sounds reasonable: It could be psoriatic arthritis (psa) but your doc will consider other diagnoses also. If it is psa, it is not a once-and-done disease like an infection. Psa is a chronic condition like hypertension that needs to be managed, not cured. The good news is that newer medications have been developed that often control the symptoms quite well.