I seem to be prone to developing kidney stones. what foods should i avoid and what are the causes for kidney stone development?

Stones: Most common stones are ca oxalate. Avoid oxalate rich foods such as spinach, black tea, nuts, etc, you can find list online. You should increase your intake of citrate rich foods (lemonade). However more importantly you should increase your water intake to at least 2 l a day, also this might sound contraintuitive but you should increase your dietary calcium intake (milk and milk products).

Food's not the key: I'm sorry you've gone through the kidney stone experience and am glad you are being treated. Staying well-hydrated with dilute urine is more important than food choices. For uric acid, cystine and struvite stones, medical treatment. Calcium stones require a check for hyperparathyroidism / hypercalcemia, underlying medical illness and perhaps some dietary calcium restriction -- ask your doctor.

Need stone analysis: + 24hr urinalysis to find out stone composition ; amount of various substances in your urine. Such as calcium, citrate, uric acid etc, uologist or nephrologist will know. In mean time, always drink lots of water 8 - 10 glasses/day, especially during summer. Most important thing to avoid or reduce is salt in your diet. Ur on hydrochlorthiazide, best med to reduce calcium in urine. Reduce red meat.