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Hi there,This is Dr Basu, experienced Internal Medicine Specialist.I am here to address your concerns and provide great service.
Do you have any constipation or diarrhea?Do you have any nausea or vomiting?Without any other symptoms, this can be just muscle spasm related. Ribcage and paraspinal muscles can be stiff from day to day activities or from bra related pressure.
Playing tennis can cause muscle spasms from overexertion, dehydration and heat.
Also colon infectionor inflammation is a possibility since you do have diarrhea.
Stool tests can be ordered.
Kidney stone will cause blood in the urine microscopically at least.
That is still a possibility.Dehydration can also make that worse.
A kidney ultrasound should rule that out.Best wishes
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