There are many possible causes. You do need to talk to a good doctor and let them do a general check of the most common reasons. Unfortunately, it can take years and years to figure out the uncommon ones (and much of that falls on you).
One key question: Did this occur after you had, or may have had, Covid-19?
Long term fatigue and mental fog are common long term symptoms after Covid-19. Do an internet search on "Covid Long Haul" and start reading. There are currently multiple theories on why. No solid answers yet. I'm personally going through this - and while I have identified that various IgE and IgG allergies are a solid partial cause... they are not the whole of the problems I am having.
I am tired all the fucking time
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There are many possible causes. You do need to talk to a good doctor and let them do a general check of the most common reasons. Unfortunately, it can take years and years to figure out the uncommon ones (and much of that falls on you).
One key question: Did this occur after you had, or may have had, Covid-19?
Long term fatigue and mental fog are common long term symptoms after Covid-19. Do an internet search on "Covid Long Haul" and start reading. There are currently multiple theories on why. No solid answers yet. I'm personally going through this - and while I have identified that various IgE and IgG allergies are a solid partial cause... they are not the whole of the problems I am having.
I wish you the best in this,