bruise from b12 injection Restylane Bruising: Beat it in 2025! What happens if you inject
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Still, if that's what you're getting, then I would suspect that as potentially the problem

If you have trouble conceiving, your doctor may prescribe hCG in combination with other drugs such as menotropins (Menopur, Repronex) and urofollitropin (Bravelle) to boost your fertility

Add to this the fact the procedure is often traumatic, I dont really like the results on most patients
Zheng L

First described back in the 1950s, acne erupts in about one in ten people within days or even hours of getting an injection of vitamin B12, which then disappears rapidly when injection treatment is discontinued. At the time, we had no idea what the mechanism might be, and the problem remained unsolved until just a few years ago when we finally figured it out: Vitamin B12 modulates the gene expression of the skin bacteria that cause acne
