Jaime is working in a hot, humid environment and complains about uncomfortable, itchy spots on her arm. What might she be suffering from?

Heat rash is a common condition that occurs in hot and humid environments, particularly when sweat is trapped in the skin. This can lead to the development of small, itchy spots or bumps that can cause discomfort. The condition results from the occlusion of sweat ducts, causing perspiration to become trapped beneath the skin. In Jaime's case, the presence of uncomfortable and itchy spots on her arms suggests that she is experiencing these classic symptoms of heat rash.

The other conditions listed generally present with different symptoms. Heat cramps involve painful muscle contractions typically due to loss of electrolytes and dehydration. Heat exhaustion can result in heavy sweating, weakness, and fainting but does not typically manifest as itchy spots. Heat stroke is a more severe condition characterized by extremely high body temperatures, confusion, and potential loss of consciousness, which also does not align with Jaime's symptoms.

Therefore, the identification of heat rash as Jaime's condition is based on the specific combination of her environment and the nature of her discomfort.