### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
My husband has cancer in the liver with metastases in the lungs. His liver numbers aren t too bad, but in traveling over the holidays his legs, feet and ankles have swollen. We went to the ER and they put him on lasik, which he was on earlier this fall due to swollen ankles and feet. Now he is getting a red rash which is spreading over his body. I don t know what to think/do about the rash.

### output:

Hi welcome to ChatDoctorI have gone through your query regarding rashes and swollen ankles and feet? I can understand your concern for your husband getting health problems one after another.  The cause for swelling can not be singled out, as your body works as unit - a machine. If one part of it, is damaged machine refuses to function. Machine can only function properly if our immune system is strong. Dear in fact, Your body is always fighting something -- an infection, a toxin, an allergen, a food or the stress response -- and somehow it redirects its hostile attack on your joints, your brain, your thyroid, your gut, your skin, or sometimes your whole body. Your immune system is your defense against invaders. But when the immune system becomes weak, the disease cells can grow out of control, the disease overpowers inflammatory process is a byproduct of the activity of the bodies immune system, which fights infection and heals wounds and injuries. Under normal conditions, the immune system has other special factors that control and limit this inflammatory process. 95% of lung cancer patients are diagnosed because they develop symptoms muscle weakness with or without tenderness edema (swelling caused by fluid accumulation especially in the feet and ankles) , itchy skin or rashes , fatigue, loss of appetite and weight loss, altered sense of taste, fever. It means that a low cellular oxygenation level in newly-formed cells are actually going to turn cancerous. In 1931 