Eriksen was rushed to hospital on Saturday after he collapsed in the first half of the match against Finland, with his teammates forming a ring around him as he was treated by medics.
The match was abandoned for around 90 minutes, but Eriksen was able to send a message to his teammates before they returned to the field to complete the game.
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‘I will cheer on the boys on the Denmark team in the next matches’
Eriksen posted a picture of himself on Instagram on Tuesday morning (15 June), which shows him smiling from his hospital bed.
In the caption, he wrote: "Hello everyone. Big thanks for your sweet and amazing greetings and messages from all around the world. It means a lot to me and my family.
"I'm fine - under the circumstances. I still have to go through some examinations at the hospital, but I feel okay.
"Now, I will cheer on the boys on the Denmark team in the next matches. Play for all of Denmark. Best, Christian."
On Monday (14 June), Eriksen sent his first message to supporters through his agent, saying: "Thank you, I won't give up. I feel better now - but I want to understand what's happened," he said.
"I want to say thank you all for what you did for me."
Denmark team doctor Morten Boesen says his medical results have so far been normal.
Boesen told a news conference:"The exams that have been done so far look fine,"
"We don't have an explanation why it happened. I can't answer that question.
"I didn't see it live, I saw it on screen when it happened. You saw the same as me. No explanation so far."
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