Lymph nodes are supposed to be soft and good, and in normal people they are rarely palpable, except in some superficial places. For example, the back of the ear or the jaw are easy to feel. In addition, the thinner people with thinner subcutaneous fat, it is possible to touch the lymph nodes in other parts of the body above, but the normal lymph nodes are soft, if you touch the lymph nodes are hard, it is possible that the following two situations: first, it is possible that the lymph nodes are near the soft tissues of the organs, the emergence of infection. Acute pharyngolaryngitis and acute tonsillitis caused by upper respiratory tract infections can cause lymph nodes to become enlarged and painful in the upper part of the jaw or neck. If it is a bacterial infection of the lower limbs, such as dengue or inguinitis, it will also cause lymph node enlargement in the groin of the lower limbs. Secondly, malignant tumors appear in the organs near lymph nodes, which invade the surrounding lymph nodes through lymphatic circulation and cause pain, commonly seen in breast cancer or malignant tumors in the chest cavity, resulting in swollen lymph nodes in the armpit.