Does an mri with an injection painful the next day?

Mri with injection: Normaly no, unless there is extra bleeding at site of injection and as a result there is swelling and discomfort, it is not really painful.

Not usually: Usually, there is no pain at the site of injection the next day after an MRI study. Occasionally, the injection site may nick or injure a blood vessel, resulting in some bleeding under the skin called a hematoma, and this may be painful. And the contrast can leak out of the vein with injection, which usually causes pain and swelling the same day. Treat with NSAID, heat, and maybe a mild ace wrap.