My finger hurts and keeps on cracking when I open...

Dear Customer
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What is the possible causes of your medical condition ?
1. skin infection
2. previous injuries 
What is the next step ?
1. consult a dermatology doctor as soon as possible 
2. do the needed tests :
- physical examination
- effected area bacterial culture 
What is the possible treatment options :
1. using mositurzing creams 
2. antihistamine topical medication 
3. steriod topical creams such as delor 
4. topical antibiotics such as erthromycin 
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Kind Regards