EXO's Luhan left fans worried as he recently revealed he would be absent from their concert in Thailand due to health reasons.  

On September 11, he wrote on Weibo, "I feel like I need to apologize to our fans in Thailand and everybody else.  For a long time, I've had a continuous nervous headache because of excessive fatigue, so that I could not sleep and was often dizzy; the doctor told me to take a break for the time being.

I will not be able to go to the concert in Thailand.  I'm really, really sorry.  I tried to take in everything on the schedule, but I don't think I'll be able to right now.  I hope that I can improve as quickly as possible and take part in the Beijing concert.  I hope that no one will worry."

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Although he asked fans not to worry, fans still reacted with concern especially since there was an occasion during a concert in China back in July, in which he showed symptoms of a heat stroke, such as dizziness and dehydration, due to the heat wave. 

Recently, he went to Beijing, China for the Chuseok holidays and was allegedly seen at a local hospital by fans and Chinese media outlets that took pictures and circulated them on line. 

Meanwhile, the concert in Thailand is set to take place on September 13 while the concert in Beijing will take place from September 20 to 21.  Hopefully, he will feel better soon!