You should probably change your name to Mr. Fitness. Hehehehehe.
The best thing to do is to go see your doctor and make sure your don‘t have a structural or ligament or tendon problem with your wrist. Assuming theres no problem, and I doubt there is, think about this.
Your 16 and growing rapidly. The tendons and ligaments in your hand and the tendons in your forearm and wrist are developing too. Cracking noises and pain will not be uncommon since your performing alot of exercises with heavy weight that utilize the arm and the wrist. You may have to learn how not to over-do it.
I‘d recommend a more well rounded set of weight exercises. Not just to exercise other areas but to give time for resting other muscle groups. One day do chest, shoulder and abs, another day do upper and lower back and triceps, another day do legs, biceps, and forearms. Then cycle back. The web site at
www.musclenow.com is good. Unfortunately you have to pay for the information, but its really good info once you get it.
More importantly I‘d suggest warming up and training the forearms before doing exercises.
Do a couple of sets of:
palm up forearm curls, palm down forearm curls, and palms facing eacthother curls. Use light weights so you can do about 10- 20 reps per set for 3 or 4 sets. Its just a warm up.
I‘d do the same every third training day with more weight or more reps to train the forearms
more vigorously.
I use two dumbbells at 15 bls each for at least 10 reps per set and exercise the forearms. I just lie the forearm on my thigh and use a dumbbell per hand at the same time. You can use a barbell but the dumbbell gives each hand its own focus.
I speculate that the reason your wrist hurts is because the tendons in the wrist and forearm are overworked and painful. You‘ve overworked the wrist.
I suggest for about two weeks, lay off heavy bicep curls and the bench press or any exercise that puts alot stress on the wrist. This will take the stress of the wrists. Do the forearm curl exercises as noted above. This will work the overstessed tendons and help them heal. Use light weights. Keep this up until the pain goes away.
When the pain goes away, make sure to warm up the wrists before doing heavy exercises. Migrate back to heavier weights slowly. If the pain comes back, keep exercising the forearms but train with lighter weights for awhile. Cycle the weeks with heavy and lights weights to give the wrist time to heal.
Until your 18 or 20, the wrist/forearm strength may lag relative to the rest of your body. Keep them in good shape.
Good luck.