Lymphoma is a cancer that affects the lymphatic system, which is part of your immune system. The lymphatic system is made up of a network of tubes (lymph vessels) and glands (lymph nodes) throughout your body.

The first symptom of lymphoma is often a painless swelling in one or more lymph node, usually in the neck, armpit or groin. The swelling is caused by a build up of abnormal lymphocytes in the lymph node.

Many people have swollen nodes due to an infection. So if you have swollen nodes, don’t panic - just get them checked by a doctor.

Other symptoms of lymphoma include:

• unexplained tiredness or fatigue
• night sweats or fever
• unexplained poor appetite or weight loss
• widespread itching
• trouble getting over infections
• pain in the chest or stomach area
• unexplained, persistent cough or shortness of breath
• headaches or vision changes
• red patches on the skin.

Please note that many other conditions, such as the flu or a virus, can have the same symptoms as lymphoma. If you or some you know is experiencing these symptoms, and you do not know the cause, it is important to see a doctor.