Sun bath

If you mean sun bath (sunbathing), it is the practice of spending time in sunlight, usually to enjoy the warmth or help the body produce vitamin D.

Benefits of sunbathing

• Helps your body make vitamin D, which is important for healthy bones.
• Can improve mood.
• May help regulate your sleep-wake cycle.

Safety tips

• Limit direct sun exposure to about 10–30 minutes, depending on your skin type and the strength of the sun.
• Avoid the strongest sunlight, usually between 10 a.m. and 4 p.m.
• Use sunscreen, wear a hat, and stay hydrated if you’ll be outside longer.

If you meant something else by “Suna bath” (such as a sauna bath), let me know and I’ll explain that instead.