Hello & welcome to Just Answer! If you have any questions after reading my answer, be sure to let me know.
Sun burn would not cause vomiting,
This is NOT a case of poisoning, so need to worry about vomiting
Home treatment measures may provide some relief from a mild sunburn.
Sun poisoning is your skin’s allergic reaction to being overexposed to the sun or the rays from tanning beds. In layman’s terms it is a severe type of sunburn. It is also called sun allergy. The medical terminology is Photodermatitis. People who are more susceptible to sun poisoning are the ones whose skin has low melanin content, which is the substance that give your hair and skin its color.
You do not have sun poisoning, and do not need to worry about vomiting
No need to get worried about vomiting :)
Remember to leave a positive feedback
The time frame is the same as for sun burn ... within a few hours
Is there anything else that I can help you with ?
Take care, and get well soon