Baby rash

Katherine
Just a quick question. My daughter has a rash on her cheeks that she's had now for about 4 months, she's now 8 months old. I've asked the Health Visitors about it but they've just said it's probably some dry skin and to put E45 cream on it. I've been doing this twice a day for weeks now and it's not improving. It looks like little spots under the skin. Any ideas on what it is and what I can do to help it go? Thanks in advance xx