Normally, lymph nodes are found all over the body, with more lymph nodes in the armpits, groin, neck and behind the ears. In this case, if we can gently touch the swollen lymph nodes in the armpit, we can consider that this upper body arm area has some bacterial infection or viral infection resulting in a combination of symptoms, and we may choose to treat the swollen lymph nodes according to the situation, such as the use of antibiotic drugs.