The sensation of irritation or discomfort that makes you want to scratch can occur for different reasons. Sometimes, itchy skin may be an early sign of cancer or a reaction to certain cancer treatments. Because itchiness is quite common and rarely a cause for alarm, knowing if it’s a sign of cancer may be difficult to tell.
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Types of cancers that can cause itchy skin
Itchy skin, or pruritus, is most often due to something else other than cancer. In 2018, a study of 17,000 patients at the Johns Hopkins Health System revealed that those with generalized itching were more likely to have cancer than those who did not. According to the study, the types of cancers that cause itchiness include:
- Blood related cancers like leukaemia and lymphoma
- Bile duct cancer
- Liver cancer
- Gallbladder cancer
- Skin cancer
The study also found that the type of cancer that makes one’s skin itch differs from one ethnicity to the other. For instance, it emerged that black patients were more likely to have skin cancer and blood-related cancers as the cause of itchiness. On the other hand, white patients were more likely to present with itchy skin when they have liver, lung, digestive tract cancers and cancers of the reproductive tract such as ovarian cancer.
Should you be concerned?
Certain cancer treatments like chemotherapy and radiation therapy could also trigger a reaction that causes itchiness all over the body.
Apart from these cancers, some other diseases can also be the reason why your skin itches. Conditions like kidney disease, HIV, diabetes, liver disease or shingles could be the cause as well. Itchy skin could also be the result of eczema, dry skin, insect bites or an allergic reaction.
You should see a doctor if the itch lasts longer than a week and if it’s accompanied by darkish urine, yellowish skin, you scratch to the point of bleeding, or you are unable to sleep at night due to this. However, it's important to remember that any sort of irritation or dry skin can cause a completely innocent itch. You should only be concerned if the sensation persists.
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Sources used:
PubMed:Association between itch and cancer in 16,925 patients with pruritus: Experience at a tertiary care center
