Lymphoma is a blood cancer that starts when lymphocytes (a type of white blood cell) grow out of control in the lymphatic system. It’s the UK’s fifth most common cancer, with about 13,600 non-Hodgkin and 2,200 Hodgkin diagnoses each year, and rates are projected to rise. It can occur at any age but is more common in men aged 60–80.

Doctors highlight six warning signs people often ignore. First, persistent whole-body itching (pruritus) can be linked to blood cancers. Second, painless swelling—especially where lymph nodes cluster (neck, armpits, groin, behind knees)—warrants prompt GP review.

Third, heavy night sweats that soak clothes or bedding, and fourth, unexplained, recurring fevers or temperature spikes, can signal lymphoma activity. Fifth, debilitating fatigue that affects memory, concentration, mood, and daily function isn’t “just tiredness.”

Sixth, unintentional weight loss is a red flag (seen in many cancers). If you notice any of these—especially a combination—book a GP appointment promptly. Early assessment can rule out other causes (e.g., infections, IBS) or speed a life-saving diagnosis and treatment.