 
                            What Could A Recent, Painful Bump On A Child's Mastoid Bone Indicate, Given That It's Hard, Asymptomatic, And Not Movable?
 
 
                                    
                                     Tue, 10 May 2022
                                                
                                            
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                                                Tue, 10 May 2022
                                                
                                            
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                                             Wed, 30 Oct 2024
                                                
                                                
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                                                Wed, 30 Oct 2024
                                                
                                                
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                                            she said she did not know it was there and I am confident it could not be there more than 2-3 days. she does not have any cold symptoms and did not have an ear infection in over 3 years.
Please share photos and basic bloods
Detailed Answer:
Hi,
Usually, a painless lump is present for a longer duration than a few days, and it may well be that it came to your notice a few days ago. I am glad that you have clearly mentioned that she hasn't got any cold symptoms or a recent ear infection.
Purely based on the facts that you have shared with us, a cyst seems likely, or an evolving skin and subcutaneous infection. I think the latter is more likely as it is painful when pressed.
It might be useful to shine a pencil torch into the swelling in a dark room to see if the entire swelling "lights up". This may indicate that there is clear fluid in it - a sign of a possible non-infectious cyst. If, however, the light does nothing, then an infection is a possibility.
You might ask a doctor to do some blood tests like a full blood count and a C- reactive protein, which is a marker of inflammation and infection. An ultrasound might also be very diagnostic and should be considered. I would appreciate if you took a picture of the swelling and shared it with me.
Thank you. Please get back to me once you have these. Thank you for asking your question on our service.
Regards
 
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