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 morning or the evening because at this time the sun is not very strong. Sunbathing shall be done in the presence of soft sunlight. 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, do not sunbathe further. That's the sign that the sunlight is no softer.
Please watch the video below for a deeper understanding of sunbathing.
English:
https://www.youtube.com/watch?v=Ilh91OMG7Qk
Hindi: