Something on the bed is poking me — I can't sleep.
Tips
memory
硌 = 石 (stone radical) + 各. The stone radical is the giveaway — it's specifically about a hard object pressing into flesh. Think of stepping on a Lego brick: that sensation is 硌.
mistakes
Colloquial — pronounced gè in this 'press uncomfortably' sense. The character also has a literary reading luò (in 硌牙 'gritty against teeth'), but spoken Mandarin almost always uses gè.
