Sleepiness & feeling fatigue is hindering my studies

Patient : Whenever I study and after I eat lunch, I have a tendency to fall asleep. I've taken a glucose tolerance test a few years back per my rheumatologist & I know I'm borderline diabetic. Lately, I always feel tired and I can't concentrate. What could possibly be wrong with me and what can help me? Caffeine doesn't seem to help me anymore and this constant sleepiness is not helping me with school.
Symptoms:  Feeling fatigued, sleepiness, lack of concentration
Doctor :   Hello Thanks for using "Ask The Doctor" for posting your query. There could be plenty of reasons for constant tirednes s, sleepiness and reduced ability to function. The common ones that come to my mind are anemia (reduced hemoglobin), B12 deficiency, Calcium or Vit D3 deficiency , hypothyroidism etc. Any of these are a combination of these can present with the said symptoms. The best part is that all these can be investigated by blood tests. It would be advisable to meet your doctor and get a complete blood count done, along with Serum B12 elevels, Calcium and D3 levels and thyroid levels done. Also there is a possibility of sleep apnoea which can lead to inadequate sleep due to repeated sleep interruptions at night. This cause is also fairly common and if all the blood tests come normal then a sleep study may be planned. Lastly even depression can present with such atypical symptoms. Basically the treatment of the underlying cause can lead to improvement in your symptoms. So do meet your doctor and discuss these tests and get yourself evaluated. Hope this helps, Wish you a good health.

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