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Hello and Thank You for contacting JustAnswerI am sorry to hear your baby is having trouble.
This could be due to ear infection, skin infection,allergy, skin mites
Some owners find using Benadryl is helpful. Here is a link to the recommended dosage
You can also try a 1%hydrocortison cream on the areas he is scratching avoiding the eye area.
If neither of these helps I would recommend having him seen by your vet. Continuing to scratch the skin raw could result in a secondary skin infection. Scratching the ear could lead to problems such as an ear hematoma which often requires surgical repair.
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I hope this has been helpful, please reply back if you have additional questions or concerns