<s>[INST] My husband has been staining his pillow case and upper top sheet with blood every night for a month ow. I have shown him the blood and done daily laundry of sheets. He has a chronic cough and uses Tussin CF almost two times a day. He is n meds for Parkinsons and Dementia and has Merkel Cell Cancer on his left temple two yeArs ago. Supposedly cured with radiation. Is it possible he has developed lung cancer? [/INST] Thanks for your question on Chat Doctor. Coughing out blood is not a good sign. It can be seen in1. Infection like TB and pneumonia2. Bronchitis3. Malignancy. Since your husband is having previous cancer, chances of lung metastases are more. So get done chest x-ray first to rule out all these. You may need CT THORAX for better evaluation of lung condition if chest x-ray is not concluding. So better to consult pulmonologist and discuss all these. </s>