maybe because my sleep schedule is not organized. sometimes, i sleep at 12 midnight and wake up at 10 am tomorrow. and sometimes, i sleep earlier and still wake up at 10am. sometimes, i sleep whole night, but still wake at 10 am. so unhealthful.
maybe wut rienas said is true
riena said
maybe ur imunities is not powerfull enough.
p/s: my...., even to type this feel very hard.