Have A Pea-size Nodule That Popped-up Yesterday Afternoon Just To

Have a pea-size nodule that popped-up yesterday afternoon just to the left of the midline on middle of neck. feels like to little hard peas next to each other. Thought at first that it was perhaps a mosquito bite but not so sure today. is a little sore to the touch if you press on it. Have been coughing due to a cold. what might it be.