I would like to know what causes breast paining

Dear Customer
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Causes of breast pain ?
1. hormonal changes and period 
2. breast lumps 
3. injury 
4. infection 
What is the next step ?
1. consult a surgery doctor / you may need to consult OBGYN doctor as wel
2. use hot pads on breast to relieve pain
3. avoid coffee and smoking
4. have plenty of rest 
5. make sure you are not taking medication that cause breast pain as a side effect 
6. take pain killers orally such as ibuprofen 
7. for infections , doctor may prescribe antibiotics such as amoxicilin for 2 weeks 
8. if there is a pus , doctor will take out the infection pus by needle 
9. if your breast lump case is severe , doctor may recommanded the surgical option to deal with it 
Needed tests :
1. physical examinations by doctor
2. blood test 
3. hormonal levels test 
4. breast ultrasound test 
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Kind Regards