Core Viewpoint - Erythromycin ointment is widely used for various conditions, but its application is often inappropriate and constitutes misuse [1][3]. Misuse Scenarios - Erythromycin ointment is promoted as a "universal medicine" for conditions such as insect bites, eczema, acne, athlete's foot, and even for treating diaper rash in infants [3]. - For diaper rash, the primary treatment should focus on moisturizing, reducing irritation, and anti-inflammatory measures rather than solely relying on erythromycin ointment [4]. Treatment Recommendations - Effective treatment for diaper rash includes applying moisturizing creams, minimizing diaper wear time, and using appropriate topical medications based on the severity of inflammation [4]. - In cases of insect bites, while erythromycin ointment can reduce the risk of infection, it does not relieve itching or inflammation [5][6]. - Erythromycin ointment is not effective for eczema, where the treatment should focus on moisturizing and anti-inflammatory agents [7]. - For acne, erythromycin ointment is insufficient as acne treatment requires a multifaceted approach [8]. - Athlete's foot, a fungal infection, necessitates antifungal treatment, which erythromycin does not provide [9]. Appropriate Use Cases - The suitable application of erythromycin ointment is primarily for treating minor burns and wounds where there is a risk of infection [10][11]. - It can be used for minor abrasions and superficial burns after proper cleaning and disinfection, but should not be used continuously for more than one week [12].

Group 1: Sweaty Eczema (汗疱疹) - Sweaty eczema typically appears on palms and fingers, characterized by clusters of small blisters resembling water droplets [2] - It is a type of eczema that is highly prevalent in late spring and early summer, with symptoms including intense itching, pain from blister fluid, symmetrical distribution, and a tendency to recur [3][4] - Factors contributing to sweaty eczema include allergic reactions to metals, fungal infections, and lifestyle factors such as stress and poor sleep [4][5][6] - Treatment is generally self-limiting, with symptoms resolving in about two weeks if triggers are avoided [7] Group 2: Heat Rash (痱子) - Heat rash, also known as prickly heat, occurs when sweat cannot evaporate due to high temperatures and humidity, leading to inflammation [23][24] - Adults can also suffer from heat rash, especially those in high-temperature jobs or with certain health conditions [25][26] - The most common types of heat rash include white, red, and pustular types, each with distinct characteristics [27][28] - Proper management involves keeping the skin cool and dry, using mild cleansing products, and potentially applying calamine lotion [30][31][32] Group 3: Athlete's Foot (脚气) - Athlete's foot is a fungal infection characterized by itching, peeling, and blisters, often exacerbated in hot and humid conditions [35] - It is important to differentiate between foot odor and athlete's foot, as not all foot odor indicates a fungal infection [36] - Common misconceptions about treatment include the ineffectiveness of vinegar and iodine foot soaks, which do not adequately address the fungal infection [38][39][40] - Effective treatment requires antifungal medications, and adherence to the full treatment course is crucial to prevent recurrence [44]