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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
If it is measles
, symptomatic treatment should get started as it is a highly contagious disease. Maintain hygiene, get her treated, take care.