If u google, there is no answer for "why vertigo happen".
And, many answers surrounding the treatments for vertigo, are focusing on "how to put the crystal into the ear canals". instead of "what causes the crystal to fall out from canals?. 
in this video, Mr Ben is going to share with u, after so many years of working and observing closely patients with vertigo, all of them have 1 common issue, which is not aware, not picked up, not assessed by medical profession.
the similarity is, all vertigo patients are having head tilted/rotated on the Cervical neck bones. 
this tilt/rotation is not aware by the patients themselves, except until being told by physiotherapist.
Therefore, by getting the head rotated back to the Cervical bone, NOT only the vertigo is treated, it almost never happen again.
 

Locations
Benphysio @ Oval Damansara

☎️ 016-390 2015 https://wa.link/7z3t62

📍 Unit 2-1 & 2-2, 2nd floor, Oval Damansara

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Benphysio @ Bangsar

☎️ 010-263 2015 https://wa.link/ep5nw1

📍 17, Persiaran Ara Kiri, Lucky Garden, Bangsar

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Benphysio @ Puchong

☎️ 010-253 2015 http://wa.link/rfclxn

📍 40-G, Jalan Puteri 1/2, Bandar Puteri

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Benphysio @ KL

☎️ 010-283 2015 https://wa.link/fthmu8

📍 Lot G.09, Ground Floor, The Grange @ Ampwalk

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Benphysio @ Shah Alam

☎️ 016-240 2015 https://wa.link/rfp237

📍Ground Floor, Mercu PICORP, Jalan Astaka U8/84, Bukit Jelutong Business & Technology Centre, Shah Alam

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Benphysio @ KD Giza
☎️ 016-439 2015 https://wa.link/r6z8ef
📍C-11-G, Sunway Giza Mall, Jalan PJU 5/17, Dataran Sunway, 47810, Kota Damansara, Petaling Jaya, Selangor
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Benphysio @ Cheras
☎️ 010-287 2015 https://wa.link/zcipap
📍Ground Floor, 213 Jalan Sarjana, Taman Connaught, 56000, Kuala Lumpur