<s>[INST] My 5 yr. old daughter has a rash that just appeared over night. It s on her lower back, bottom and upper legs. They are red bumps with a head on them and they itch really bad. She has never had chicken pox but I can t figure this out. 4 nights ago she dumped my husbands shampoo in the bath to make bubbles but the spots just showed up today. Other than that there have been no changes in her diet or soaps. [/INST] Hi, Welcome to HCM, The rashes can be due to allergy as she used the shampoo that  she should not have used. Children have delicate sensitive skin. Antihistamine Syrup and mild medicated lotion/cream can be of help. Do not let her scratch. It is important to rule out any fungal infection, viral infection. Get her  examined clinically by a doc. Diagnosis should be made early to start the treatment, she will  need antibiotics and ointment surfaz to be applied locally if ring worm infection is detected. If it is measles, symptomatic treatment should get started as it is a highly contagious disease. Maintain hygiene, get her treated, take care. </s>