Good evening my daughter 8 months staying in...

Treatment of allergy ? 
Treatment is carried out mainly by staying away from allergens, and we advise to pay attention to good nutrition, and you can use  Betamethasone ointment once daily in the event of skin rashes, and cortisone can be used under medical supervision, in addition to the use of an antihistamine, such as Loratadine 5mg once a day
Diagnosis : 
By taking full medical history and clinical examination and Doing CBC and Allergen test
Symptoms :

• Skin rash 
• Itching
• General weakness 
• Vomiting and diarrhea

Advice : 
you should use the Pediatrician