Thanks for your question on Healthcare Magic.
I can understand your concern.
In my opinion, she should take calcium and vitamin d 3 supplements as she is having deficiency of these.
Deficiency if calcium and vitamin d 3 is common cause for chronic
costochondritis.
So first start calcium and vitamin d 3 supplements.
Tell her to follow below mentioned lifestyle modifications for better symptomatic relief in costochondritis.
1. Avoid heavyweight lifting and strenuous exercise.
2. Avoid movements causing pain.
3. Avoid sudden jerky movements.
4. Apply ice packs on affected areas.
Don't worry, she will be alright with all these. No need to
consult rheumatologist.
Hope I have solved your query. I will be happy to help you further. Wishing good health to your daughter. Thanks.