This is likely to be boil or carbuncle. You can apply Betadine solution on it which is available over the counter. Most of the time they subside on their own / spontaneously. If the pain, redness, tenderness increases or fever appears, you may need antibiotics earlier, otherwise a watchful waiting can be done. It does not seems to be anything serious.
Please feel free for your follow up questions.
So in the main they go! i presume these cases on the internet re MRSA and complications are rare!
I am not usually like this but got almost in a panic over it today! think the hormones don't help. is it a normal size about 2cm across, not terrible painfull just soar? also shoudl i continue with the savlon or get the stuff you recommended? betadine? do I need to check its a boil first or will this not hurt?
Skin infections are most likely to be boils or carbuncles, so unless the severity of the symptoms warrant; you may persist with the watchful waiting. Betadine is better than the savalon, so if you go outside; get it from the health store. Internet does not give correct perspective of these things and if you put your symptoms in a search engine; they will fill off the pages with MRSA which unnecessary perturbs the mind. Please do not worry; unless the symptoms I had mentioned comes.
It is pleasure and privilege assisting you.