Before sunbathing, my chest was sweating a lot.

Excessive sweating on the chest after sun exposure may be caused by physiological factors as well as pathological conditions such as calcium deficiency and hyperhidrosis. Different treatments should be selected based on the underlying cause. The specific analysis is as follows:

1. Physiological Factors

If the chest is exposed to high temperatures for prolonged periods or if clothing is too thick, sweat glands may secrete sweat to dissipate heat, leading to sweating on the chest. This is generally a normal phenomenon that does not require special treatment and will resolve once the surrounding temperature decreases.

2. Pathological Factors

1) Calcium Deficiency

When the body lacks calcium, blood calcium levels may drop, stimulating the sympathetic nerves and potentially causing the aforementioned symptoms. Patients can take medications such as calcium gluconate zinc oral solution, calcium gluconate tablets, or tricalcium chewable tablets under medical supervision.

2) Hyperhidrosis

In patients with hyperhidrosis, abnormal sweating may occur even under normal conditions, and chest sweating after sun exposure may become more frequent. Treatment options include iontophoresis using tap water and direct current.

In addition, conditions such as anemia, hypoglycemia, and hyperthyroidism may also contribute. It is recommended that patients seek timely medical evaluation to determine the exact cause and receive appropriate, standardized treatment under a doctor's guidance.