IL17A and psoriatic arthritis: In chronic inflammatory disease such as psoriatic arthritis, hidradenitis suppurativa, alopecia areata, pyoderma gangraenosum, many studies have shown that biologics (e.g., TNF‐α and IL‐17A inhibitors) offer considerable advantages in terms of improving disease status, quality of life, and overall satisfaction.24, 25, 26, 27, 28