1. Ointment contains components that promote urine or sweat excretion. Diuretics or antiperspirants can increase the excretion of urine or sweat, leading to weight loss the next day after sleep.

2. The ointment contains highly hygroscopic component sodium chloride, which will increase the weight of the ointment after absorbing water. When the ointment is applied to the skin, it will absorb the moisture on the skin surface, resulting in weight loss the next day after sleep.