<s>[INST] My two year old just got her thumb stuck in the wheel of our pram. It has taken all the skin off down one side. It didn't bleed but a watery yellow tinged fluid has been coming out of it since about two minutes after it happened. She is freaked out & wont let me near it. Any advice? [/INST] Hi..it could just be a mild abrasion and the serum is oozing out. Pus canot form like this so fast. Wash it with clean water and soap and apply an anti-septic ointment as first -aid.If it is swelling or redness is increasing or has high fever or blackish discoloration of the finger and you approach the nearest medical center.Regards - Dr. Sumanth </s>