1. Unexplained weight loss:

Losing ten or more pounds for unknown reason can be a sign of pancreatic, stomach, esophageal or lung cancer.

2. Constant fatigue:

Constant fatigue can be a sign of leukemia as well as some colon and stomach cancers.

3. Abnormal lump:

Have you recently felt a mass or lump right below your skin? This may be a sign of cancer. Lumps normally show up in the breast, testicles, lymp nodes and soft tissues, like tendons and ligaments. Report it to your doctor immediately, especially if you just found it, or it has grown in size.

Increase in size of testicles:

Have you noticed changes in the size of your testicles, like one or both have gotten bigger? Perhaps you 've found a lump, or your testicles feel swollen or extra heavy. Any of these signs should send you straight to your doctor. Testicle cancer is mostly common in young and in middle aged men.

5. Change in your skin:

If you work long hours outside or have a history of blistering sun burns, check your skin closely. What you think are signs of hard work might actually be skin cancer. Look for unusual bleeding, scaling or sores that do not heal. Other signs include warts as well as moles and freckles that change in color, size or shape. If you have got a strange spot on your skin, call your dermatologist.

6. Persistent cough:

Do you have a nagging cough? If it lasts more than three weeks, it's a bad sign. And whether you smoke or not, a cough that doesn't go away can be a sign of lung cancer. Persistent hoarsness, wheezing, shortness of breath or coughing up blood are also signs to call your doctor immediately.

7. Persistent pain:

Headache, nagging back pain that won't go away, abdominal or stomach pains your doctor needs to know. Persistent pain, no matter the location, can be the first sign that something's wrong.

8. Changes in your mouth:

If you smoke, chew, dip or spit tobacco, you need to pay close attention to changes inside your mouth. White patches inside your mouth or white patches on your tongue may be pre-cancers.

9. Indigestion or trouble swallowing:

A prolonged painful burning sensation in your throat or chest shouldn't be ignored. It could be a sign of esophageal, stomach or throat cancer.

10. Changes in your restroom habits:

Suddenly need to use the restroom all the time? Or have pain when go? This may be a sign of bladder or prostate cancer. Other signs to look out for are blood in your urine or stool. Changes in your bowel habits, like constipation or diarrhea that won't go away, matter too.

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