Hello dear
I understand your concern
Rashes in inner thigh could be due to diper rash,
fungal infection.
Diaper rash is due to chemical reaction between urine , feces and diaper material with skin.
I would suggest to consult your
pediatrician fir examination and proper treatment.
Following treatment will help you:
Avoid diper in day time and even during day time use for short period.
Use pure cotton loose diper.
Apply barrier ointments with zinc each time after your baby soils.
Keep the area clean and dry.
Use warm water to clean and avoid soaps.
Use mild cleaning solutions like syndet.
If rash is in red color then antibacterials like
fusidic acid and antifungal cream like
clotrimazole should be useful.
Hope this may help you
Contact further if follow up needed
Best regards
Dr. Sagar