Hello,
Thank you for posting your question to HCM,
Acne sometimes is caused by the problems in the fatty glands of the skin pores. The spots, are a type of acne. So if your skin produces oil, lime may help, even though there is nothing scientifically about it. Honey has also proved to be beneficial in acne.
Everybody skin is different, and reacts differently to treatments. If your skin likes it, and you see that its helping, than continue with it. But if its not better, you may need a cream, that is a medicine typically for the type of spots that you have. In this case, a doctor should see your skin, and evaluate the level of spots/acne.
Herbal/homemade treatments, in general are safe. The biggest side effect that lime may do, is to make your skin dry, but honey will help to prevent it.
So I would say, go for it, try it, and see if it helps.
Let me know if you have further question.
Take care.
Dr. Papaqako.