My daughter has a rash on both hips & under her armpit, on her hip the rash is pruple inside the red part of the rash what does that mean?

Hidraadenitis? Cystic purple swelling in these areas may be inflammed glands called hidraadenitis suppuritiva. This will not respond to over the cow ter products. It may respond to antibiotics but need to be evaluated by dermatologist or primary care physician in person for proper diagnosis and treatment.