6. Check the lymph nodes on your neck and collarbone. Use the first 3 fingers of each hand to circle behind your ears, down each side of your neck and under your jaw line. If you feel lumps accompanied by tenderness, you may have swollen lymph nodes.You may also feel fullness in your throat and have difficulty swallowing.. Check the lymph nodes on your neck and collarbone. Use the first 3 fingers of each hand to circle behind your ears, down each side of your neck and under your jaw line. If you feel lumps accompanied by tenderness, you may have swollen lymph nodes.