<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have been experiencing some strange symptoms lately. I have noticed pus in my sputum and my back feels weak.  <response>: These symptoms could be indicative of Trichiasis. Its an eye condition where your eyelashes grow inwards towards your eyes, causing irritation and discomfort. It doesnt usually present with the symptoms you described, so we need to check for other possible conditions. 