It is often difficult to determine the exact cause of red bumps on a young child's skin. If the bumps are not accompanied by a fever or discomfort, there is usually no cause for concern. Possible causes could include dietary factors, exposure to a new product on the skin, or a mild virus. It is recommended to monitor the rash and if it persists or worsens, it is advised to consult a healthcare professional. It is also advised to avoid sun exposure in the coming days.