Hi, since the itching is more on somedays and less on the other days. I would suggest keeping a close watch on anything that may be triggering that rash like certain food, soap, cream or any other type of exposure.
Next Steps
'Boil' is a very vague term. I would recommend you to book a consultation, so that I can examine her thoroughly and see what kind of rash it is. Also, as you are looking for homoepathic treatment, we have various options which are safe to choose from. We will need to take detailed history.
Health Tips
Meanwhile, try using a gentle moisturizer/calamine lotion for a soothing effect.