I have some alargi came in my face ..I don't know...

Dear Customer
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How to treat skin allergic reaction ?
1. first of all , avoid the cause of the allergy such as medication or food or any other cause
2. to relieve skin symptoms , you may use :
- antihistamine ( topical or oral ) such as : BENADRYL
- corticostiroids ( topical or oral ) such as : DELOR
3. in case of needing to use oral corticostiroids , you should first consult a dermatology doctor 
Possible causes for your medical condition ?
1. allergic reaction to medication
2. insect bite 
3. food allergy 
4. other reasons such as perfumes or weather or dust and so on 
Symptoms of allergic reactions :
1. rash
2. reddness
3. itching 
4. involing other systems symptoms such as shortness of breath . discomfort . alter mental status 
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Kind Regards