These small bumps were the residual forbidden drugs that had remained in his body. They would absorb the effects of medicines and hence, prevent his injuries from healing.
Sima You Yue picked up the tweezers and pinched out the little bumps, then she placed them into the small bowl that had been prepared beforehand. She actually filled up the whole bowl.
"It's more than I thought!" She tweezed out the final one and placed it into the bowl, then she put the tweezers aside. She took out a medicinal pill for treating external injuries and gave it to the Prince.
"Is he fine now?" Yu Yan asked.
"I have done everything I can. Once the Prince has absorbed the potion in this barrel, he can come out." Sima You Yue said, "The water has to be completely clear before he can come out."
"So simple?" Yu Yan was a little surprised, he thought that it would be very complicated!