It itches. Miliaria, caused by blocked sweat ducts, commonly occurs in newborns due to their underdeveloped sweat ducts, as well as in hot environments and situations like prolonged bedrest, which can easily lead to the condition. Some skin infections that block sweat ducts can also cause miliaria. Miliaria is classified into types such as clear miliaria, red miliaria, pustular miliaria, and deep miliaria. Red miliaria is characterized by a burning and itching sensation. In areas with pustular miliaria lesions, there is also a burning, itching, and painful sensation, while the symptoms in areas affected by clear and deep miliaria are less noticeable.