For 12 hours, a woodcutter has been working outdoors in windy weather at the air temperature of + 4-5°C. His shoes were compressing the distal parts of his feet. Now he complains of a pricking and burning pain in his toes 1-3 on both feet, pain in the interphalangeal joints, and decreased skin sensitivity in toes 1-3. Examination detects slightly edematous toes, bluish skin, painful and reduced movements in the interphalangeal joints, slightly reduced skin sensitivity, and retained pulsation of the arteries on the dorsum of the feet. What is the provisional diagnosis in this case?