An aura fills, and while it's not everything, it feels like soaking in a hot spring and having your head gently warmed. It's like light, and it can also be called energy. This mainly happens above the ears, while the lower part is still somewhat sparse, but overall, the entire head is enveloped in something that feels like light or energy.

With this, the inside of the head becomes easier to relax, and the sensations of "mish-mish" and "crack" are no longer as hard and difficult to move as before. Instead, there's some movement, and then a hard spot "cracks" and releases.

Previously: Hardness is the basic state. Concentrate your awareness through meditation to gather energy at one point and release it. "Mish," and then "crack."
Now: Some movement is the basic state. When concentrating through meditation, energy becomes stronger and spreads over a wider area. This gathered energy causes contraction and expansion, and along with the pulse, hard areas release with a "crack."

Energy now gathers even without as much concentration.

Until recently, I used to hold my breath (kumbhaka in yoga) to forcefully relax very stiff areas, and then concentrate my awareness on one point to gradually release them. But now, that's not necessary. By concentrating my awareness to some extent, a certain amount of energy gathers around it, so holding my breath (kumbhaka) is becoming less necessary. Holding my breath (kumbhaka) can sometimes cause unnecessary tension, mistakenly stopping energy flow in places where it should be flowing, and causing strange areas to become blocked, which can suddenly make my awareness hazy. Therefore, I think it's important to be careful with holding your breath (kumbhaka). Ideally, this should be done under the guidance of a yoga instructor.

Recently, holding my breath (kumbhaka) is no longer necessary, and even without it, energy fills, like a hot spring, and various areas are becoming relaxed.