14 Cancer Warning Signs Your Doctor Should Never Ignore
There are many common bodily symptoms that could be perfectly normal or could be a cause for concern. Here’s how to know which ones your doctor will consider significant.
Blood is rarely a good thing unless you know where it’s coming from (a cut or scrape, for example). If you’re seeing blood and aren’t sure why—whether it’s in your mucus or from a cough—make an appointment with your doctor. “This can be blood in urine, blood in bowels, vaginal bleeding after menopause, or coughing up blood,” says Martha K. Terris, MD, the Witherington Distinguished professor and chair at the Medical College of Georgia in Augusta University.
Women, whether or not they’ve been through menopause, also shouldn’t ignore unexplained bleeding—it’s just one of the 15 silent signs your body might be in big trouble.
Chronic issues are your body’s way of getting your attention. “A pattern I’ve noticed is that many patients have symptoms that can be explained and improve with treatment. But they kept reoccurring without a good explanation as to why—and nobody paused to ask why this is happening,” says Mendel Goldfinger, MD, an oncologist at New York-Presbyterian Brooklyn Methodist Hospital. “For example, a 40-year-old who never had pneumonia and all of a sudden develops pneumonia twice in a year needs to ask his or her doctor why this is now happening even if the pneumonia improves with treatment of antibiotics.” Discover why seeing your dentist regularly can help prevent pneumonia.
Lumps or bumpsjavi_indy/Shutterstock
If you knock your shin into a coffee table, there’s a good chance you’ll see a bruise and lump crop up. But if lumps, bumps, or unusual knots are turning up and you can’t remember running into anything, be suspicious. “Lumps can involve the skin or be under the skin in the groin, armpit, neck, breasts, or abdomen,” Dr. Terris says. If they persist or come back regularly, make an appointment to see your doctor. Here are 7 things a lump in the breast could be besides breast cancer.
An unexplained fever—you don’t have an infection or virus that could be causing it—is cause for concern, especially if it reoccurs. “If you have a fever for 24 hours or 48 hours and take some Tylenol and it goes away, it is not a cancer fever,” says Ioana Bonta, MD, a medical oncologist at Cancer Treatment Centers of America in Atlanta. “But a low-grade fever for a week or two weeks that doesn’t go away even if you take Tylenol or ibuprofen—that is a concerning fever.” In case you’re wondering, this is why fevers make you feel cold.
Unexplained weight lossjoklinghero/Shutterstock
Most of us wouldn’t look this gift horse in the mouth—but that’s unwise, warns Dr. Bonta: Unexplained weight loss is never good. “Cancer secretes hormones that cause mass wasting,” she says. “Generally, people with cancer will lose weight. If you haven’t changed something—like your diet or started exercising—and you’re losing weight, it’s a problem.” Don’t miss these 15 signs your weight gain means your health is in trouble.
As with fever, night sweats are a sign your body may be in overdrive fighting cancer, a virus, or other invading cells. “Your body sees the cells as foreign and up-regulates the immune response, leading to symptoms like fever and night sweats,” Joel Warsh, MD, a holistic and integrative medicine practitioner in Studio City, CA. This is especially common with people who have lymphoma or leukemia, Dr. Bonta says. “Any patient with leukemia, they’ll tell me they get up in the middle of the night and will be soaked. They have to change their bedspread and pajamas,” she says. These night sweats are different from hormone-related hot flashes, Dr. Bonta points out. “If you can identify a cause for it and treat it, it’s not cancer. But drenching night sweats are a concern for some types of cancer.” Here are 7 more reasons you may sweat at night.
Persistent heartburnKleber Cordeiro/Shutterstock
If you’re keeping the antacid company in business, you may need to talk with your doctor about a stronger medicine—and the possibility of a cancerous cause. “Gastric cancer is not the most common cancer, but it’s increasing in incidence,” Dr. Bonta says. “People who have reflux or gastroesophageal reflux disease (GERD) may not realize it, but the lining of the esophagus is changing.”
With prolonged reflux, the normal, healthy cells that line the esophagus are replaced by abnormal cells that can become cancerous. This condition, called Barrett’s esophagus, can be a precursor for cancer, Dr. Bonta says. “Persistent heartburn can actually be one of the first signs of cancer, especially if that heartburn is coordinated with trouble or pain swallowing,” she says. If you’re wondering what’s the difference between heartburn and reflux and GERD, we break it down for you.
Mouth or tongue sores that don’t healC.PIPAT/Shutterstock
Common mouth sores like canker sores or cold sores are annoying—but rarely a serious concern. These sores are typically caused by herpes simplex virus type 1, a highly communicable virus that’s passed when you kiss or share a cup or fork with someone who carries it. The sores can be brought on by illness, stress, or sun exposure. However: “If you have a persistent sore—like for a month—and it’s not going away and getting worse, this is something that needs to be checked out,” Dr. Bonta says. The sore could be a sign of skin cancer or, rarely, a head or neck cancer. Here are 10 more places you’re ignoring when you check for cancer.
Skin lesions that changePRASAN MAKSAEN/Shutterstock
Moles and freckles rarely grow, change color, or shift size. If you see a spot on your skin that does any of those things, you may be looking at cancer. It’s time to make an appointment with a dermatologist. “Any changing lesion needs to be seen by a dermatologist, especially in people with fair skin. They’re at high risk for melanoma,” Dr. Bonta says. “Don’t wait to see if it goes away.” She adds that it’s not only fair-skinned people that should be aware of skin cancer. “One of the worst melanoma cases I’ve seen was in a man, 20-something, from Ethiopia. He had a pretty aggressive form of melanoma on the sole of his foot.”
Also, be aware that not all melanoma will change shape or size. Spots you’ve had for years are worth checking with a dermatologist, Dr. Bonta says. “Having spots that have been there forever does not mean it’s nothing,” she says. “Often it is nothing, but you still need to be checked every year.” Don’t miss these 7 sneaky places you can get skin cancer (that aren’t on your skin.
It’s not unusual to experience bloating from time to time, especially after eating high-fiber foods you may be sensitive to, like Brussels sprouts and beans. Again—persistence is key: If bloating persists over time and doesn’t ease even though you changed your diet and tried all these stomach bloating remedies, it’s time to talk with your doctor.
“The most common symptom in ovarian cancer patients is increased abdominal pressure,” Dr. Bonta says. “They say they get very full very fast. It may be nothing because bloating is a common post-menopause symptom as well, but it’s also one of the most common symptoms of ovarian cancer,” she explains. “Ovarian cancer is called the silent killer because once we find it, it’s too late. There isn’t screening for it. That’s why you need to pay attention to symptoms.” Here are the 6 silent symptoms of colon cancer you may be missing.
Irregular bowel patternsIhar Krents/Shutterstock
Your bowel habits may change with what you eat, but if they’re unpredictable and troublesome, you may be seeing signs of potential cancer. “I’m worried about constipation and diarrhea, but I’m most worried about alternating between the two,” Dr. Bonta says. “Colon cancer or other GI malignancies can stop up the bowels and keep stool from moving through. That can lead to constipation. At some point, the backup will lead to diarrhea. Any constant changing, or any alternating between constipation and diarrhea, is a problem.” Don’t miss the 7 clear signs you have an unhealthy gut.
Coughing is your body’s way of clearing things that irritate the lungs. A cough with allergies or flu isn’t uncommon. However, if you have a persistent cough with no other symptoms, you may need to get screened. “If you’re a smoker and you have a cough, I wouldn’t wait three months until you see your doctor,” Dr. Bonta says. “Your risk depends on how long you’ve been smoking—the pack-years.” The term applies to the number of packs a person smoked a day multiplied by the number of years they smoked. “The higher the number of pack-years, the higher the risk of getting lung cancer.” If you need a little more motivation to help you quit, check out these 15 mind-blowing ways your body heals after you quit smoking.
A cough can also signal danger If you’ve been exposed to smoke, chemicals, or other potential carcinogens, either from your home or work environment.
Lesions on the genitalsVioletStudio/Shutterstock
While this is most commonly a sign of sexually transmitted diseases, lesions on a vagina or penis may also be a symptom of cancer. “HPV (human papillomavirus) can manifest itself as warts,” Dr. Bonta says. The virus can also cause cervical cancer, which is why a regular Pap smear is so important for women—every three years for healthy women under 30, and every five years for women older than 30 (though you should discuss this with your doctor).
Another concern, according to Dr. Bonta: Head and neck cancer cases are on the rise because of HPV infections from oral intercourse. “Yes, you can still get HPV from oral intercourse,” she says. Find out why this cancer-causing virus affects men way more than women.
Frequent urinationSeksun Guntanid/Shutterstock
“Prostate cancer is the second most commonly diagnosed cancer among men in the U.S.,” says Vahan Kassabian, MD, a urologic oncologist at Georgia Urology. (Skin cancer is number one.) “Most men are diagnosed with an early stage of the disease, which typically has no noticeable symptoms.”
However, Dr. Kassabian says, some prostate cancers will spread locally, and that can lead to symptoms. “Men with locally advanced prostate cancer may experience urinary symptoms, such as more frequent urination or a week urinary stream,” he says. “For men with more aggressive, metastatic prostate cancer, common warning signs include fatigue, aches and pains, weakness or numbness, trouble falling or staying asleep, and difficulty doing everyday activities, such as walking up the stairs or taking out the trash.” Men, these are the 9 things your prostate secretly wants to tell.