b12 injection cause headache I've had a migraine since Sept 4th. I took a that day (prescribed by my doctor) so I'm wondering if it's related or coincidence. I'm scared to take another one What Does A B12 Deficiency
Description
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They're not just about addressing deficiency
Different Types Of Needle Gauge You need to select the needle gauge based on the quantity of medicine that you need to administer
In rare cases you may suffer bruising, redness, swelling or itching at the injection site which is normally transient and limited to 48 hours

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The authors demonstrated that male PwPD presenting with HHcy had significantly lower levels of Vit B12 and more rapid motor progression
