Your painful lymph nodes in back of neck are due to they secondarily got infected. The primary source of infection could be from the rash if you meant it to be wound in neck or from scalp, back of nose (nasopharynx
) or right ear itself.
you mean loss of touch sensation or hearing impairment?
Examination can reveal the site of primary infection and the reason for your 'numbness' of earlobe. So for this please consult an ENT specialist
cream is not going to solve your painful lymph node problem. You will need a course of antibiotic.
Wish you good health.