Skin gets tanned or burned due to excessive exposure they get to ultraviolet (UV) radiation from the sun.

UV radiation is a form of energy that comes from the sun, and it is divided into two types: UVA and UVB. UVA rays penetrate deep into the skin and cause long-term damage, such as premature ageing, while UVB rays cause sunburn and other short-term effects.

When you expose your skin to UV radiation, your body produces melanin, a pigment that helps protect the skin from further damage. The more melanin you have, the darker your skin will appear. People with fair skin have less melanin, which means they are more likely to burn than tan. People with darker skin have more melanin, which means they are less likely to burn and more likely to tan.

However, please note that tanning is still a sign of skin damage, and excessive exposure to UV radiation can lead to skin cancer. So, it is necessary to protect your skin from the sun by wearing protective clothing, using sunscreen and avoiding sun exposure during peak hours.