Difficulties with wearing a device? discussion

Hello everyone, I’ve started using a Holy Trainer V3 and I’m really enjoying it. Before this, I managed to stay in chastity for around 10 days without any major problems. After taking a break of roughly a month (to ensure everything was functioning properly…and it did haha), I have begun my second round. This time I am using a base ring that is slightly smaller at size 45, down from the usual 50. It required a bit more effort to put on this go-around, but in return, I find it feels better and sits more securely. Overall, I feel very good wearing it. However, I do have one query. I suspect this is just paranoia, though everyone’s experience might differ slightly, so your thoughts would be welcome. With the device on (this was visible even with the bigger ring, but much clearer now), I notice purplish or blue veins appearing on my testicles, particularly along their sides. There is no pain whatsoever - they feel perfectly normal otherwise. Interestingly, this also occurs when I am not wearing the cage and simply pull the scrotal skin taut, so it seems linked to how stretched the skin gets rather than just pressure from the device. Can we safely assume this is okay and part of my natural anatomy provided there isn’t any pain or numbness? Cheers!