Sounds like a boil. Since there are more than one she should see her doctor, as she will need a course of antibiotics to help clear this up. In the mean time, apply a warm/hot compress to the area several times a day, which will promote the infection to to drain so it can burst. Do not squeeze this, as it can cause further infection. If you can get it to drain on it's own, it's best.Soaking in the tub with some Epsom salt can help too.
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