Quotation על שבת 188:12

One who plucks out signs of uncleanness or burns quick flesh transgresses a negative commandment. And as regards cleanness: If they were plucked out before he came to the priest, he is clean; But if after he had been certified as unclean, he remains unclean. Rabbi Akiva said: I asked Rabban Gamaliel and Rabbi Joshua while they were on the way to Narbata, "What is the ruling if the plucking occurred while he was isolated?" They said to me, "We did not hear anything [about this case], but we have heard that if they were plucked before he came to the priest he is clean, and if after he had been certified as unclean he remains unclean." I began to bring them proofs: whether the man stands before the priest or whether he is isolated, he is clean unless the priest had pronounced him unclean. When does he attain cleanness [after he has been certified unclean]? Rabbi Eliezer says: after another nega arises in him and he has attained cleanness after it. But the sages says: only after another nega has spread over his whole body or after his bright spot has been reduced to less than the size of a split bean.