Which is the best shampoo and conditioner for...

Treatment of ear pain
It is common type of pain affecting high percentage of people due to many factors and causes. Firstly, it is better to avoid touching your hands and itching by your hands. Also , keep your ear area clean and dry to avoid any infections or inflammation of your ear. About drugs, you can
Take analgesics like IBUPROFEN three times daily to relieve pain.
Also, you can use Gentamycin ear drops three times daily to relieve any inflammation in your area.

Investigations to do
You can ask for CBC to see the level of WBCs which increased in inflammation and infections of ears. Also ,you can ask your ENT doctor for examination of ear by a scope to clarify any causes like foreign body and infections of ear.
Causes of ear pain
There are many causes like
Traumatic ear pain
Foreign bodies
Inflammation and infections of ear
Increased wax in ears

Advice,
you can seek your ENT doctor for further evaluation

you can use any shampo but shloud be care to get water to the ear