possible causes in my case that I can think of :

來源: snoow 於 2016-12-27 18:21:29 [] [舊帖] [給我悄悄話] 閱讀數 : (123 bytes)
本帖於 2016-12-27 18:23:03 時間, 由普通用戶 snoow 編輯

strep throat and treatment, long-term stress, lack of sleep, bad mood (anger), poor health to start with...

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