You’d have to give me quite a bit more to work with.
It would be like me telling you I have a mode of transportation and what is wrong with it when it goes “chachunk”. Is it a scooter? A bike? A car? Is it a 4 cylinder? A 6? Is it automatic or manual? Is it 2001 or 1911?
So are you old, young, active, sedentary, tall, short…
Are you learning from a book, a DVD, a friend, the power of the Universe?
Are you practicing ONLY trikonasana or is it done within a sequence? If so what sequence? And finally, how are you doing the pose? Hand on block, shin, floor, nothing? What actions are you doing in the pose?
Can you include a photo?
gordon