What should you know about lung cancer symptoms on skin?

Possible changes include persistent itching, a new or changing lump, unusual redness, flushing, yellowing of the skin or eyes, or a rash. Some people develop skin findings linked to an immune response, while others have changes caused by medicines, infection, dry skin, or a separate skin condition. Cancer that has spread can occasionally affect the skin, but a skin finding by itself does not show where it came from. Describe its location, appearance, onset, and any pain or discharge.

Book a medical review for a new, persistent, spreading, bleeding, painful, or changing skin finding. Take clear photos in good light if the appearance varies, and bring a list of medicines, creams, supplements, and recent treatments. The clinician may inspect the skin, check nearby lymph nodes, review symptoms, and arrange a blood test, scan, or skin sample when appropriate. Do not stop prescribed cancer treatment without discussing a suspected skin reaction with the treatment team.

Seek urgent help for swelling of the lips or tongue, trouble breathing, blistering or peeling skin, a rapidly spreading rash, fever with a new rash, severe weakness, or yellowing with confusion. These can signal a serious reaction or another condition needing prompt treatment. A painful red area with fever also warrants same-day advice.

Could this be related to my cancer, treatment, or another skin condition? Should I use or avoid any product? Does it need a skin sample or other test? Which changes should make me contact the team immediately?