What Causes Pain In The Ribs While Suspecting An Insect Bite?
Most probably an abscess.
Detailed Answer:
Hi.
Thanks for your query, albeit short and specific.
To recapitulate: Female/70 - about 1/2'' hard nodule - under the skin - just below upper rib cage - painful on palpation - wants to know whether this is possible due to bite of spider mites in bougainvilla...
Spider bites usually cause flat lesions in the skin - rarely a nodue only if it gets infected. The skin shows distinct circular lesion and ecchymotic appearance.
Hence the most probable cause may be a small infected cyst or an abscess.
Since there is tenderness, it is better to take an anti-inflammatory like Ibuprofen if it suits you - better than aspirin. Ans also a shot course of an antibiotic to help resolve the infection at the earliest.
Please post clear and focused pictures if possible as these help for on-the-spot diagnosis.