Dr. Hanif warmly welcomes you! Thanks for consulting at my virtual clinic HCM. I have carefully worked through your case, and can well realize your health worries. Being your physician, I want to assure, I will take care all of your medical concerns. Probable cause:- Lipoma. What it actually is?:- The lump which you have defined as medium solid in your query is actually a collection of fat cells accumulated inside a capsule covering. It is formed just beneath the skin and you have got it on your right rib cage. What is causing that pain to you?:- When you touch and press on it, the fat cells get pushed but the capsule is fixed to the surrounding tissues and can t be pushed so causes a pull on the attachments of capsule. This causes sharp tearing pain Is there some worries regarding the lump?:- Only pain is the worry, otherwise there is no need to worry as lipomas usually don t undergo malignant cancerous transformation. Why it happened to you?:- It has a strong genetic predisposition and you were prone to their formation. Your body weight doesn t matter. Diagnostic test needed?:- Yes, Ultrasound to confirm my diagnosis. Do you need treatment?:- Yes, because this lipoma has became painful. Such patients when land to my office, I do treat them for a definite reason-the pain. What the best treatment is?:- Resection under local anesthesia by the physician/General Surgeon in Minor Operation Theater. Until you get appointment take Ibuprofen for pain and avoid pressing on the lump. Can it recur?:- Yes. Hope I answered all of your questions. Please don t forget to add your precious positive feedback to help me able to assist you better in future too. Have a wonderful time ahead. Keep in touch for a follow-up too to let me know if you have any doubts & need further assistance. I am available 24/7 for your help. Have a blessed time ahead. Regards! DR. MUHAMMAD HANIF USA