Why is the ear temperature normal in the morning but rises to 37.7°C in the afternoon, and what should be done?

Normal ear temperature in the morning but reaching 37.7°C in the afternoon may be caused by physiological factors, or could result from medical conditions such as ankylosing spondylitis or systemic lupus erythematosus. Treatment—whether general management or medication—should be based on the specific underlying cause. Detailed analysis is as follows:

I. Physiological Causes

If individuals are affected by food stimulation, poor sleep, or are women going through menopause or their menstrual period, they may experience low-grade fever in the afternoon. This is a normal physiological phenomenon and usually resolves spontaneously.

II. Pathological Causes

1. Ankylosing Spondylitis

This is a chronic inflammatory disease. Due to autoimmune dysfunction and inflammatory stimulation, patients may experience fatigue and low-grade fever in the afternoon. Patients should follow medical advice and may take medications such as celecoxib capsules or tofacitinib citrate tablets.

2. Systemic Lupus Erythematosus (SLE)

SLE is an autoimmune inflammatory connective tissue disorder that primarily affects young women and can involve multiple organs. The disease may become active in the afternoon, leading to more intense immune reactions and resulting in low-grade fever. Patients should follow medical guidance and may take medications such as methylprednisolone tablets or hydroxychloroquine sulfate tablets.

In addition to the common causes mentioned above, low-grade fever in the afternoon could also be caused by conditions such as tuberculosis, hyperthyroidism, or leukemia. If patients experience any discomfort, it is recommended to seek prompt medical evaluation and treatment at a hospital.