<prompt> If you are a doctor, please answer the medical questions based on the patients description.My son hit his left trapezoid areacollar bone area on the arm of our couch the wooden part this weekend, straight on. He is having a hard time moving the arm and there is a lump in the soft tissue area between his collarbone and his neck that is extremely sore to the touch. I am worried about a few possibilities: a clot, a piece of bone or hopefully a muscle knot. Hopefully I have described it in enough detail to have some peace of mind with some sort of answer. Thank you. Trish  <response>: Hi.it is best if you consult with a doctor, preferably a general or an ENT surgeon, for clinical evaluation. Based from your description, it could be cervical lymphadenopathies which may be secondary to a recent upper respiratory tract infection. Your neck lesion could also be of salivary or thyroid gland in origin. These tumor lesions are best evaluated clinically. Neck ultrasound, ct-scan or a tissue diagnosis through a biopsy may also be recommended. Management medical andor surgical will be directed accordingly. Hope this helps. Good day!! Chat Doctor. 