If your child is exposed to someone with roseola and becomes infected with the virus, it generally takes a week or two for signs and symptoms of infection to appear — if they appear at all. It's possible to become infected with roseola, but have signs and symptoms too mild to be readily noticeable. Roseola symptoms may include:
* Fever. Roseola typically starts with a sudden, high fever — often greater than 103 F (39.4 C). Some children may also have a slightly sore throat, runny nose or cough along with or preceding the fever. Your child may also develop swollen glands in his or her neck along with the fever. The fever lasts for three to seven days.
* Rash. Once the fever subsides, a rash typically appears — but not always. The rash consists of many small pink spots or patches. These spots are generally flat, but some may be raised. There may be a white ring around some of the spots. The rash usually starts on the chest, back and abdomen and then spreads to the neck and arms. It may or may not reach the legs and face. The rash, which isn't itchy or uncomfortable, can last from several hours to several days before fading.
Other signs and symptoms of roseola may include:
* Fatigue
* Irritability in infants and children
* Mild diarrhea
* Decreased appetite
* Swollen eyelids
I got this from the Mayo Clinic website...hope it helps. I have never had experience with Roseola, but it does say irritability is a symptom. Good Luck momma!!