Is having a sore throat a detox symptom?

Yes. Having a sore throat is a common detox symptom that may come up when you're fasting. It is a sign that your praanshakti has started the cleansing process inside. 

Here are a few things you can do to get relief :
- Please take proper rest and continue the fast
- If you have wet pack, apply it thrice a day (especially on the neck)
- If you have an enema, take the enema twice a day - once in the morning & once in the evening
- Sunbathe for 30 minutes every day (only in the light morning/evening sun)
- Do not consume any food or medicines

To understand all of these steps in detail, please watch this video - https://www.youtube.com/watch?v=CZDgxv1plfw&t=210s

You will see that the problem will automatically go within 2-4 days, once it has achieved it's purpose of detoxification.