Mastoid tip is involved in
Bezold abscess
Luc abscess
Citelli abscess
Parapharyngeal abscess
Bezold abscess can occur following acute coalescent mastoiditis when pus breaks through the thin medial side of the tip of the mastoid and present as a swelling in the upper pa of the neck. (Ref: Textbook of diseases of ENT, PL Dhingra, 7th edition, pg no. 87)
Ear