I feel burning sensation/itching after sunbathing.
If you're feeling a burning sensation or itching while or after sunbathing, that means the sunlight was harsh.
Sunbathe in the early morning or the evening because at this time the sun is not very strong. You need the light of the sun, not the heat.
When sunbathing, as soon as you start sweating or feeling a burning sensation on your skin, stop sunbathing. We should not cause any violence to our body.