Hi, within the last day or so I have discovered a lump about the size of a marble underneath my chin midway towards my neck. Around the same time I have been experiencing dizzy spells that r exacerbated by sudden head movements. The chin lump doesnt really hurt and it kinda feels like a swollen lymph node. Yet I have never noticed it there before.
Hi. Thanks for your query and an elucidated history. The lump under the chin is a lymph node unless otherwise proved. You may please take a course of an antibiotic and anti-inflammatory medicine under Doctors prescription for 5 days. Consult an ENT surgeon - he will look after both the problems.  The dizziness can be due to either a cervical spondylitis or problem due to internal ear. He will be in a position to decide the reason and ask you for investigations like X-ray or MRI of the cervical spine and mastoids. And start treatment for it.