Hello. In the postcovid period, an increase in blood sugar up to 12 mmol/l is possible, especially if hormones were used in the treatment, followed by the expected decrease to normal. It is recommended to follow a diet with blood sugar control before meals and 2 hours after. But it is advisable to consult with endocrinologist, undergo follow-up examination (tests, ultrasonography), so as not to miss severe endocrine disorders and the development of their complications, since Covid affects the entire endocrine profile.