1. She may still have residue from groomer's shampoo and/or cologne spray.
Wash her with a hypo shampoo. Be sure to completely rinse shampoo out. Follow it with hypo creme rinse.
2. If she has fleas you should see them if you look closely. Look in tummy, groin, and base of tail.
3. If you find fleas ask your vet if he would suggest a spot on defense against fleas.
Hope this Helps.