Thanks for asking the query,
Pain in the tooth can be because of periapical infection abscess
formation , it can also be because of crack in the tooth .
You need to visit Dentist
get the clinical evaluation of tooth , take an x-ray .
If infection is deep it can be treated with RCT and if the tooth is fractured it is to be extracted .
Take tab combiflam
500mg thrice for 3 cays .
Take saline water gargles 3-4 times a day .
Take 0.2% of chlorhexidine
mouthwash gargles twice daily .
in the ear and lips can be because of temporomandibular joint disorders ,neurological disorders or ear infection .
Visit an Oral Surgeon and an ENT specialist and get complete check up done .
Hope this helps out .