Yes. It can be a sign of eczema.
Are there similar areas elsewhere on the skin?
It can be a fungal infection, which has gone secondarily infected.
Would be able to help you when we see the pics of the area.
Use a mild soap like dove.
Do not use strong tubes like betnovate or quadriderm in that area.
Next Steps
please consult ASAP, before the rash aggravates.
Health Tips
use mild soap
wear loose cotton clothes
avoid undergarments
do not eat spicy chilly oily food or nonveg