"Mae cynnydd annisgwyl mewn achosion o'r ffliw a gastroenteritis wedi cyfrannu at y pwysau, gyda mwy o achosion o'r ffliw wedi'u cadarnhau mewn ysbytai mor belled y gaeaf hwn o gymharu â'r un adeg y llynedd.
“Big spikes in cases of flu and gastroenteritis have contributed to pressure, with more flu cases confirmed in hospitals so far this winter than the same time last year.