如果脑肿胀进一步恶化，将转变为High - Altitude Cerebral Edema (HACE，高海拔脑水肿)，一种非常危险的状态。

If the swelling continues to worsen, it can become High-Altitude Cerebral Edema (HACE), a very serious condition.

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结论：由低海拔区快速进入高海拔区后可致脑水肿形成。

Conclusions: it could be a reason for formation of high altitude brain edema to expose acutely to higher altitude from lower altitude.

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