<s>[INST] Hi..my mother underwent a lung biopsy two days back.I had opened up the wound yesterday and applied undiluted savlon only on around the wound area and not on the wound.Today I found water filled small blisters. I tried to burst few blisters and water came out. So I got scared and put some calo soft lotion on the surrounding area.. And covered it with dry gauze. I hope its not serious.Please help.. [/INST] Thanks for your question on Chat Doctor. In my opinion you should immediately consult treating doctor. Because your mother is having Surgical Site Infection (SSI). It is skin infection seen at the site of infection. It is mostly due to poor post-operative wound care. Fluid containing blisters are suggestive of SSI only. So your mother needs thorough cleaning of wound and proper aseptic Chat Doctor.  For all these consult treating doctor. </s>