Why do i have blisters down of my ears inside

What is the treatment of ear blisters :
1. consult an dermatolgist doctor to do the needed medical examnations and determine the treatment pathway
2. pay attention to your personla hygine 
3. avoid itching or peeling it by your self 
4. avoid using any irritant substance such as perfumes or low quality creams 
5. in this case , its usually treated (topically ) by anti-histamine medication such as Claritin or stroids such as dilor 
6. in case of being infection due to outside exposure beside blisters , doctor may prescribe topical antibiotics such as : ezthromycin 
what are the possible causes :
1. bacterial infection
2. allergic reaction
3. viral infection 
needed medical examnation :
1. physical examnation by doctor 
2. bacteria culture from effects area
3. blood test