What symptom is NOT typically associated with hard water syndrome?

Hard water syndrome primarily relates to the effects of water containing high levels of dissolved minerals, specifically calcium and magnesium, which can lead to various physical symptoms. Among these symptoms, headaches, nausea, and muscle weakness are often reported due to the mineral imbalances and the body's response to these high levels of minerals.

Dry skin, however, is not typically associated with hard water syndrome. While hard water can lead to soap residue and may contribute to skin irritation in some cases, it does not directly result in the same range of systemic symptoms that are usually linked to the minerals present in hard water. Thus, the correct choice indicates that dry skin is not a classical symptom of hard water syndrome, distinguishing it from the others.