
What Causes Lower Left Back Pain, Dizziness And Black Stool?

I would explain as follows:
Detailed Answer:
Hello!
Welcome on HCM!
I pased carefully through your concern and would like to explain that yuor current symptomatology seems likely to be due to gastrointestinal bleeding (most probable from the upper gastrointestinal tract).
Whether it may be caused by an adverse effect of your recent antibiotics treatment or a differecnt bleeding source it remains to be determined by the underlying medical tests.
Diverticulitis may also be a source of digestive bleeding.
A fibrogastroscopy and if necessary colonoscopy needs to be performed.
Also, a complete blood count to check for possible anemia, liver and renal function tests are recommended as well.
I recommend to ask immediately medical assistance to the nearest ER service at your living area as an active bleeding is considered an emergence situation.
Hope to have been helpful to you!
In case of any further uncertainties, feel free to ask me again.
Kind regards,
Dr. Iliri

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