23F Passing Out During Blood Draws: Seeking Understanding
***Additional Medical Details Provided Below***
**Summary**: I experience fainting spells exclusively when I’m sitting upright during blood draws. However, when I lie down, I remain conscious and alert. I have no fear of needles, blood, or the procedure itself. In fact, as a diabetic, I administer insulin daily without issue, and my body is covered in tattoos and piercings. Therefore, I'm accustomed to needles and the sight of blood. I have been diagnosed with POTS and suspect it may play a role, but I'd like insights into the bodily mechanisms behind this phenomenon.
**Detailed Account of the Experience**
My curiosity surrounding this issue began the first time I fainted after a blood draw. It happened while I was seated in one of those specialized chairs for drawing blood. After the procedure, as I attempted to stand up and leave, I simply took a few steps, mentioned feeling unwell, and then I collapsed into my phlebotomist — certainly not the ideal outcome for either of us! Fortunately, she was there to catch me, saving me from hitting the floor, but they recommended that I always lie down for future blood draws. I've adhered to this advice ever since and haven’t had any further incidents.
Fast forward to my recent appointment—facing another blood draw, I thought I might try sitting upright this time, assuming it would be fine. The room was cramped, leaving no space to recline, and I didn’t want to inconvenience anyone by making them rearrange things for me. To my surprise, I still faced a challenging situation (though not a total blackout this time). My vision started to darken, I experienced tinnitus, was drenched in perspiration, and trembled—all clear signs I was close to fainting again. Thankfully, recognizing the onset of these symptoms helped me avert a full collapse. I quickly laid my head down, stabilizing myself until it passed.
So, I'm left pondering the question: **what is causing this reaction**? Every time I research, the common explanations mention a response to the sight of blood or needles. Yet I’m entirely comfortable with needles and blood. As a diabetic, I inject myself with insulin every day without qualms. What's more, I don't faint when I’m lying down, which seems to indicate that the presence of blood or needles is not the underlying issue. I'm curious about the connection between my experience and my diagnosis of POTS, although I'm uncertain. My interest lies in the scientific aspects, so I'm hoping to obtain an in-depth explanation of the biological processes occurring that lead to this response. What physiological changes happen in my body and brain that trigger this reaction? And what exactly is this reaction?
**Additional Medical Information**
**Age**: 23
**Gender**: Female
**Height**: 5'4"
**Weight**: 185 lbs
**Medical Conditions**: Maturity-Onset Diabetes of the Young (MODY), Postural Orthostatic Tachycardia Syndrome (POTS), Chronic Anemia (cause unidentified), Genetic Enamel Hypoplasia, Migraine Disorder, Periodic Limb Movement Disorder (PLMD)
**Current Medications**: Tizanidine, Zoloft, Seroquel, Nadolol, Zyrtec, Vitamin D, Vitamin B Complex, Famotidine
BronchitisENTAllergy & Immunology