?? ?? ????? ????? - What is Saadoun's Problem?

لَدى سَعْدون مُشْكِلَةٌ جَعَلَتْ بَطْنَهُ مُنْتَفِخَةً، أصْدِقاءَهُ يَكْرَهونَ اللَّعِبَ مَعَهُ ووالِدَهُ يَمْشي حافِيًا

فَما هِيَ هَذِهِ المُشْكِلَةُ بِالضَّبْط؟

"Saadoun" struggles with a problem that made his stomach bloated, his friends hate playing with him, and his father to walk barefoot

So what exactly is this problem?