Nasal or sinus cancers, though rare, can cause irritation in the nasal cavity. If the itch is persistent and doesn’t go away with allergy treatments or nasal sprays, and you notice nosebleeds or changes in smell, it’s worth investigating.
What to watch for: Constant nose itching, nasal congestion without cause, bloody discharge, or facial pain.
3. Itchy Neck — May Be Linked to Lymph Node Cancer (Lymphoma)

Lymphoma-related itching tends to be deep, persistent, and hard to relieve. If you’ve ruled out allergies, skin products, and clothing irritation, and the itch continues, it’s time to speak with your doctor.
What to watch for: Night sweats, unexplained weight loss, fatigue, or noticeable swelling in the neck or armpits.
4. Itchy Abdomen — A Possible Sign of Diabetes or Blood Sugar Imbalance
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