<s>[INST] Concerning Phlegm Color In the past five days Ive been coughing up many kinds of phlegm lately. first it started with a light green then it was yellow then it was a yellowish brown now its back to yellow again. is this normal or do i need to seek medical attention immediately. if not, is there any home remedies i can do? thanks. [/INST] Hi, The colors you have described are normal and consistent with the phlegm variations. When do you need to see a doctor?1) Persistent fever for more than 3 days or fever that aggravates in the evening.2)The sputum/phlegm having a blood tinged or brownish red colour3)Difficulty breathing You can try having a cough syrup containing aerosol like Ambrosia plus. One teaspoon 3-4 times a day. It would liquify the sputum and help you clear it off from the lungs. Thank you for your query, Chat Doctor.  </s>