For early stage lymph node cancer in the neck, the main purpose of self-examination is to perform physical examination in a certain order. You can use your left or right hand to palpate your neck from top to bottom in a certain order in front of the mirror, up to the clavicle. If a lymph node larger than 1 cm is palpated, with a hard texture and poor mobility, whether it is a single lymph node or multiple lymph nodes, you should promptly consult a hospital for ultrasound, CT or even PET-CT to clarify whether the lymph nodes in the neck are enlarged. More importantly, biopsy of lymph nodes in the neck should be done to determine whether it is lymphoma in the neck. Swollen lymph nodes in the neck can be metastasis to cancer or primary lymphoma, but they all depend on lymph node excision biopsy to clarify.