Ick . " Rin held up her hands and made a face . " I 'll be right back . " She swished the stains and stink away in the running stream and scrubbed well with clean sand and under her fingernails until her skin turned pink . Her right hand seemed a little weak , the buzz and tingle increasing rather than going away . On the same side , her neck and the joint of her jaw grew numb .

Question: Why is Rin 's hand so pink and raw ?
None of the above choices .