Roseola can cause a wide range of symptoms to appear that mimic the common cold or flu. One of such symptoms is a runny nose, which may develop in conjunction with a cough. A runny nose is caused by your body as it tries to remove any bacteria that could be hiding in the nostrils or the nasal passage. To treat a runny nose, make sure the child gets plenty of water to keep the production of mucus continuous and smooth. Moreover, you may try certain over the counter medicines to help ease symptoms. If you also develop a high fever, contact your doctor.

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