A 46-year-old patient complains of difficult opening of her mouth, body temperature rise, tissue edema around both temporomandibular joints (TMJ). It is known from the anamnesis that the patient had short-term non-intense bilateral pain in the parotid-masticatory region, limited mouth opening, tension and discomfort in the region of both temporomandibular joints that had been observed for a couple of days. What is the most likely diagnosis?