In a dry indoor environment with a temperature maintained between 15°C and 30°C, a spa hot tub can typically be left unused for 2-3 months without significant damage. If exposed to the outdoors, wind and sun will accelerate the aging of the casing and seals. Even with a dust cover, it is recommended not to leave it unused for more than 4-6 weeks.

The water temperature is typically maintained at 37–40°C. Full-body immersion causes peripheral vasodilation and accelerated circulation. This not only helps with overall relaxation but also improves nasal blood flow, gradually reducing swollen mucosa and alleviating nasal congestion.

Under certain conditions, brief, mild dizziness is a normal physiological response that may occur. When you soak in a hot spa tub at a high temperature (typically 37°C to 40°C) for an extended period, your body undergoes the following changes: • Vasodilation • Drop in blood pressure • Redistribution of blood flow • Fluid loss

Yes. Soaking in a spa hot tub for two hours consecutively may offer psychological and muscular relaxation benefits, but it also carries health risks such as dehydration, dry skin, cardiovascular strain, and dizziness.

Yes, bacteria in spa hot tubs can indeed cause illness. These bacteria can enter the body through skin contact, inhalation, or mucous membrane infection, causing various health problems such as rashes, otitis externa, and Legionnaires' disease.

The continuous heating, closed-loop circulation, and suitable water temperature of a spa hot tub create ideal conditions for microbial growth. Even adding disinfectants cannot completely eliminate the risks if the water isn't changed for an extended period.