Micturition or cough also can cause ache.

排尿或咳嗽也可诱发疼痛。

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Poor posture can cause neck ache, headaches and breathing problems.

姿势不当会导致颈部疼痛、头痛和呼吸困难。

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Isthmic spondylolisthesis does not always cause immediate symptoms of pain. When it does, it usually manifests as a deep ache in the lower back.

峡部裂并不总是立即引起疼痛症状，当有症状时，通常表现为腰部深部疼痛。

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One of the biggest risks is the roundworm Toxicara canis which infects dogs and can cause anything from stomach ache to eye damage.

BBC: Pets boost children's health