good morning. by the symptoms u r explaining , the condition may be acute urticaria
which in case needs medical attention or atopic dermamtitis. in either of the case for supportive treatment u can use alovera based gel or soap and an oral antiallergic like atarax
drops around 0.5ml twice a day, avoid dairy products , sea food, egg , plantpollen . fruits like pineapple etc, the treatment suggested is only for supportive care for time being, kindly see a doctor for further care.