Hey! I had this, the vein in my elbow crease had hardened from EC and felt “wiry”. My last EC was Jan 2024 and it did go away on its own. I didn’t do anything special, just stayed on top of hydration and ate a ton of protein in the months after chemo. If it does start bothering you, keep bugging your team to monitor it, as I’m sure they’ll have something to help 