A cancer rash can look like common skin issues (eczema, psoriasis) but is often a persistent, non-healing sore, a pearly or shiny bump, a scaly patch, or a reddish patch with irregular edges that might bleed, crust, or itch, especially if it doesn't go away with typical treatments or changes over time. Key differences are that cancer-related rashes often stay in one place, feel firmer, and don't resolve, unlike common rashes.
Skin cancer signs and symptoms
The causes of a chest rash may be due to allergic, infectious, autoimmune, or environmental triggers. Rashes may be accompanied by other symptoms, including pain, itchiness, and general discomfort. OTC treatments and various home remedies are often effective in treating rashes.
Melanomas may resemble benign moles, blood blisters, ingrown nails, plantar warts, ulcers caused by poor circulation, foreign bodies, or bruises.
Mycosis fungoides – A type of cutaneous T cell lymphoma, mycosis fungoides occurs when certain white blood cells (lymphocytes) undergo cancerous changes that cause them to attack the skin. The early signs include itchy, rash-like skin patches, which may form sores and tumors as the cancer progresses.
Common Types of Precancerous Skin Growths
Actinic keratosis (AK): Also sometimes called solar keratosis because they're caused by sun damage, these small, scaly, or crusty patches can be pink, red, or various colors. They usually feel rough, like sandpaper on the skin. They're more common on fair skin.
Seek ER treatment if the rash is accompanied by any of the following:
Signs and symptoms of skin cancer include:
Possible symptoms of cancer
Some basal cell carcinomas may appear as raised, pink or red, translucent, shiny, pearly bumps that may bleed after a minor injury. They may have a lower area in their center, and blue, brown, or black areas. Know the signs and symptoms of basal cell carcinoma.
MS-related itching can happen anywhere on the body and can affect one or both sides. It most commonly affects the face, torso, arms, and legs.
Orange-yellow bumps
People who have very high levels of cholesterol or blood fats called triglycerides may develop eruptive xanthomatosis, a rash that can cover a large swath of skin. The waxy, pea-sized bumps can show up anywhere on your body but often appear on the legs, arms, shoulders and backside.
Common types and causes of skin rashes
As shown in the pictures below, they often look like small, dry, scaly, or crusty skin patches. Their color varies from dark tan to white to flesh-colored, or they are a combination of colors. They have a rough texture that you can feel. Early SCSCs are often flat and do not yet have a warty appearance.
The main cause is dermatitis, which is when your skin reacts to allergens or irritants. Bacteria, viruses, allergens and conditions including eczema, hives, and psoriasis can be the source of skin rashes. A variety of treatments can relieve your symptoms and get rid of the rash.
Some general signs and symptoms associated with, but not specific to, cancer, include: Fatigue. Lump or area of thickening that can be felt under the skin. Weight changes, including unintended loss or gain.
When cancer is suspected there is a fast route within the NHS to get further tests and specialist advice to rule out cancer. These are called 2 week wait referrals and you should be seen within 2 weeks of being referred.
Only 5–10% of all cancer cases can be attributed to genetic defects, whereas the remaining 90–95% have their roots in the environment and lifestyle.
Rashes and skin changes can also be caused by certain cancers. For example, itchiness and night sweats can be symptoms of some lymphomas. Some leukemias and breast cancers can cause rashes.
They are caused by ultraviolet (UV) damage to the skin. Some actinic keratoses can turn into squamous cell skin cancer. Because of this, the lesions are often called precancer. They are not life-threatening. But if they are found and treated early, they do not have the chance to develop into skin cancer.
Basal cell skin cancer may start as a patch of skin that looks like a rash. Over time, it may expand, forming an indentation at the center which might begin to ooze or bleed. Skin cancer will usually, though not always, appear on the parts of the body that receive the most sun exposure.
Rashes can sometimes accompany other signs of anaphylaxis — a life-threatening allergic reaction. Anaphylaxis requires emergency medical treatment. Call 911 immediately if you experience: Rash that develops and spreads quickly.
Stress rashes often appear as raised red bumps called hives. They can affect any part of the body, but often a stress rash is on the face, neck, chest or arms. Hives may range from tiny dots to large welts and may form in clusters. They may be itchy or cause a burning or tingling sensation.
Visit urgent care if your rash worsens, lasts more than a few days, or is accompanied by mild symptoms such as low-grade fever, localized swelling, or itching. Urgent care can handle most uncomplicated rashes, but more serious signs, such as a high fever, blisters, or facial swelling, require emergency care.