Where do all the red stings/bites come from?

28.10.2018:

The alarm clock rang at 09:30. Off to the train station. The ticket can only be purchased 30 minutes before departure. Thanks for nothing. At least the WiFi at the guesthouse started working again. A nice Chinese girl moved into the room. We talked for a while. Checked out and rushed to yesterday's restaurant. We had two rounds of Pad Thai and also hibiscus juice. The waiter even recognized me. We both laughed.

Then waited a bit on the terrace of the guesthouse, grabbed my stuff, and went to the train station. I actually got a ticket. However, only standing. For three hours. It was dirt cheap, but for slightly more, I could have had a seat. Why wasn't that offered to me yesterday? Occasionally, the stairs of the exit served as seating. Just before Bangkok, seats became available.

Took public transportation to the hostel. Started with a massage. This time for two hours and even cheaper than usual. Only 5.40 €, unbeatable. For dinner, I ended up in a small Thai soup kitchen. Back at the hostel, I spread out my sleeping bag because the bed didn't look trustworthy. Wait a minute, what's crawling? Out of the sleeping bag? A bedbug? No way! I searched the sleeping bag. And another one. So much for the impregnation of the sleeping bag against bedbugs and insects. So apparently all my stings and bites from the past few days don't come from the flying critters... Now the question is how I will sleep tonight. After all, I flicked the bugs onto the bed without thinking.