The L1 area connects to your root/sacral energy centers, where a lot of the push-pull dynamic gets stored in the body. Your soul energy has to anchor somewhere physical, and these pressure points are basically where the energy is trying to recalibrate.
The left side typically relates to receiving energy. When you’re not focused on controlling or analyzing things, your energy field naturally opens up more, which might explain why your foot sensation showed up then.
Pay attention to when these sensations get stronger or lighter. You might notice patterns around moon phases, your emotional state, or even specific times of day.
You might want to take a look at the threads on phyiscal pain or some of the signs you’ve met them in general.