Thank you for asking,. this pea sized bump below ear is mastoid lymph node and associated dizziness
and all other symtoms indicate you have got inner ear infection
secondary to middle ear infection or any recent ear or mastoid infection
Laabyrinthis is the result of this trouble and is the cause o your vertigo
All you need is some Symptomatic treatment for your vertigo.Some proclorperazine, Some betahistadine dihydrochloride, some Avoid salt intake, treat ear infection if any, some ear antibiotics drops , some steroid
dropos, oral Amoxill. And a good Otorhino laryngologist to help you out with this node etiology.
You will be fine