I cannot confirm anything without examination but it can be a swollen lymph node or a sebaceous cyst. 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).
Sebaceous cyst is a cyst below the surface of the skin and fills with a white cheesy substance called keratin. Apply warm compresses and consult a doctor for its evaluation.
I hope it helps. Take care and please do keep me posted on how you are doing or if you have any additional doubts. Kind regards.