First of all, it is related to physical weakness! Short-term cerebral blood supply deficiency caused by blood drawing, exercise or rapid body position change.

Second, there seems to be a blood disease.

In view of the above two points, it is still impossible to make a definite diagnosis. It is suggested to strengthen nutrition in daily life, and women should pay more attention to it. Don't lose weight blindly! Take part in moderate exercise, avoid strenuous exercise and prevent rapid posture change. If you wake up, you can wait and get up later!

Finally, this kind of problem is not so serious, but it should be prevented. At the same time, it is recommended to go to the hospital in time for a comprehensive examination!

I wish good people a long and healthy life!

Then the most likely reason now should be postural hypotension caused by posture change! As I said above, the landlord should pay more attention at ordinary times.