Hi welcome to HCm I have gone thru your query regarding persistent pain in the sternum . Dear It can be due to over exertion during gyming regime for 3 months . I am curious to know , as what all treatment you udertook as your doc says your problem is due to costochondritis ? Persistent pain in the sternum , since 1 year , is a matter of concern . m Whatever the name of disease be ,It is outcome of your weak immune system ,may be due to your inactive life style and faulty food habits . , If Chest pain is associated with costochondritis and inflammation of the junctions where the upper ribs join the cartilage that holds them to the sternum , usually preceded by exercise, minor trauma, or an upper respiratory infection. Physical therapy is sometimes used in more chronic costochondritis. Infectious costochondritis requires close follow-up to prevent spread or recurrence of the infection & inflammation . include healthy diet as fiber,vitamins minerals ,cheeze, milk , supplements full of antioxidents , in natural form --fruit ,green veges , lemon juice with water and salt and pepper before meals , ginger ,garlic , Aloe vera 30 ml , Amla ,Turmeric powder a level spoon + almond oil a Tspoon with hot milk ,at bed time, all will help boost your Immune system & alley your pains & inflammation gradually with required work out ---- To detoxify your system , do regular walk, and increase your activity level. include healthy diet as fiber,vitamins minerals ,cheeze, milk , supplements full of antioxidents , in natural form --fruit ,green veges , lemon juice with water and salt and pepper before meals , ginger ,garlic , Aloe vera 30 ml , Amla ,Turmeric powder a level spoon + almond oil a Tspoon with hot milk ,at bed time, all will help boost your Immune system & alley your pains gradually with required work out ---- To detoxify your system , do regular walk, and increase your activity level.Regular mild Exercises & Yoga postures , Dhanurassan ,Bhujjangassan , Vajjarassan pranayam -- deep breathing Inhale - Hold - Exhale - Hold This regiehelp Avoid processed foods carbs , sugar , fried ,fast foods , Tea , coffee ,alcohol and smoking , stress , sleeplessness and Constipation all will produce biochemical and metabolic conditions in your body that will decrease your immunity. So avoiding is definitely the first step in the right direction to detoxing the body, boosting the immune system . Take Homeopathic Aconite 6 and Hepar Sulph 6 / Alternate / 3 hourly / 2 days . Always remember, if problem persists , please see your doctor / professional medical treatment suggested by your doctor can be complemented using a variety of alternative therapies. Most of these therapies or home remedies focus on strengthening your immune system so that you may over come the infection and inflammation quicker . Hope this helps solves your query .Take care .All the best .Get well soonE Don t hesitate to come back in case of any further query .