This looks like a swollen lymph node in response to the cold that you had. Lymphadenopathy (swollen lymph nodes
) is usually caused by a viral or bacterial infection. Other causes include allergic reactions, arthritis, cancer, metabolic diseases, and an overactive thyroid (hyperthyroidism).
Treatment for inflamed, swollen lymph nodes, also known as lymphadenitis, depends on the cause. In some cases, over-the-counter (OTC) pain relievers and warm compresses may be all you need.