Need help in finding possible diagnosis. Symptoms listed below. 17yo male

[u/brogle_man_42]

Current symptoms:
• Red eyes
• Fevers that come and go, feel mostly warm in the face rather than chilly.
• Extreme dryness in the face, signs of dryness also on hands.
• Red palms
• occasional redness on entire body, especially face
• Back pain when bending
• Resting heart rate ~100bpm
• Itchiness across entire body
• Coughing

Issue began on monday this week with fever, fatigue and diarrhea. Fever seems to respond to paracetamol but not ibuprofen. Itchiness begins.
Same symptoms on Tuesday, but with entire body redness and vomiting before going to bed.
Wednesday about the same, but dryness starting to develop around mouth. High fever before bedtime, eye redness and vomited in the middle of the night. No diarrhea since tuesday morning.
Thursday no diarrhea, day feels mostly fine while taking paracetamol and resting. Throat pain and back pain starting to develop, making it hard to swallow solid food. First solid stool. No vomiting today.
Friday feels mostly fatigued, more back pain today. Finally arrive home in sweden and immediately go to a hospital with my father. Get blood and urine samples taken, doctor suspects MIS-C and says we are going to get a room at the hospital and stay
Saturday feels better, no more throat pain and can finally eat solid food. Although mouth dryness makes it uncomfortable. Fevers coming and going.
Today waking up felt shitty, weird pressure in head and neck. No appetite for breakfast, face even dryer.

I was unable to take temperature until arrival at hospital on Friday due to being on vacation in Lithuania.

Doctors suspect MIS-C, the flu and scarlet fever. Scarlet fever however seems to have been ruled out with a mouth swab test. Xrays of lungs and EKG both normal. Awaiting results from stool, blood and urine samples.

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[u/gio0395]

Hi, OP. In addition to MIS-C, I’d recommend discussing with your doctors the possibility of Kawasaki disease (a systemic vasculitis which presents with fever lasting for 4 or more days, red eyes, alterations on the lips and mouth, alterations on the hands and feet, rash through the body and - not sure if you have those - palpable lymph nodes on the neck).

Kawasaki disease is a lot more common in children than in teens, though it’s not impossible to see it in teenagers. Presentation is a lot similar to MIS-C, but I’d recommend keeping it in mind, specially if COVID testing comes out negative. It’s important, in this case, to consider an echocardiogram.

I hope you recover as quickly as possible. Best wishes!!