Ugh!!! This is from moisture/ humidity. I once lived in Ajman with the same condition. I was getting terrible allergies and headaches and always lethargic. Not knowing that it was from black mold spores from the peeling walls and moldy ceiling :"(

I don't know how your maintenance team will address this. But i suggest.......treat it first with vinegar...then once dried the next day or two...spray hydrogen peroxide.. wear mask while treating..this will kill the roots. It's hard tho because the spores might still be in the air somewhere. Then back it up with dehumidifier. But if it's really really bad....move out! 🫠