I would be pleased to answer your question .
From your description it looks more like an infected eczema
at the moment .
Here is what will help:
1. Clobetasol propionate
cream + Mupirocin
cream: Mix and apply over the affected area on the right shoulder twice a day for 14 days then switch to Fluticasone
propionate cream once at night for 2-4 weeks.. The specialist to see will be a dermatologist
and he or she can prescribe these for you. Nothing over the counter will help much, the only product with some benefit is 1% Cortizone cream.
Thanks and Take care