Hello,
The first issue is to determine if the infection is really a ringworm. This can be determined by a simple examination of the skin scrapping.
To me, as the baby is too young (only 7 months old) that could be due to possible infantile
eczema, and not really a ringworm. However, I'd advise to get this examination done to determine the right diagnosis.
The correct treatment of ringworm could be either with
miconazole or terbinafin (antifungals).
Clotrimazole also can help.
Fusidic acid cream is used in case of bacterial infection. So, if this is inflamed, it is more likely to be an infantile eczema more than ringworm infection.
Change shampoo or any other detergent you might be using. Do use only eczema products including shampoo, moisturizer, etc.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr. Albana Sejdini, General & Family Physician