The causes of bumps and fever in children are mainly considered to be due to the following conditions: First, viral infections, such as chickenpox, are common in children with chickenpox, which causes bumps on the face and is accompanied by fever. The bumps on the face are often very itchy, and as the disease progresses, bumps will also appear on the front and back, mostly in the shape of a herpes, which will crust over time. Secondly, children with urticaria can also suffer from urticaria, which can cause bumps on the face and even fever, and can be treated with loratadine or cetirizine. Lastly, other diseases: such as conjunctival histopathy.