Xiao Tu, 19, is from Ningbo, east China's Zhejiang province. At the end of this July, she and her friends had a tour in Xiamen and she swam in the sea there. After swimming, her ear began to ache and swell, and she partly lost her hearing. The pain lasted for nearly a week. Tortured by the ear ache, Xiao Tu was nearly collapsed.

In the hospital, the doctor finally found the cause of her illness: a small sea snail that entered her narrow ear canal!