1,106. Eyes, Nose, Ears

161:16 The woman immersing should not close her eyes too tightly because doing this forms folds. She likewise shouldn't open them too widely. Rather, she should close them loosely.

161:17 She must remove the mucus from inside her nose but what is higher up is not a chatzitzah. She must likewise clean her ears. Some authorities require a woman to use the bathroom before immersing if she feels the need. If she feels the need while immersing, she will restrain herself and the water won't reach those places. After the fact, it is of no consequence.