Any experienced animal owner knows that animals, especially prey animals, are very good at hiding pain. In the wild, this is a good survival strategy. Predators tend to pick off the weak, and so showing weakness says "come and eat me". But for a domestic animal, what would be a helpful survival strategy instead allows a problem to persist and grow until it either becomes untreatable, or the owner just happens to notice something unusual and acts to fix the problem.
The same is true for the Church. As Christians, we tend to be very good at hiding our flaws, which can be a good thing when it comes to either unbelievers or lukewarm Christians, who would either encourage us to continue sinning, or judge Christ as they judge us. However, when in the company of loving brothers and sisters, confession is both liberating, and an excellent first step to fixing the problem. If sin is left unconfessed, it can persist and grow out of control. It can even “blow up”, doing irreparable damage to our lives. Sometimes, we’re lucky enough to have brethren who can spot the problem before we confess, but we shouldn’t rely on this possibility.
If you’re struggling with sin, find a fellow Christian you can trust and confess it to them. This is the first step to recovery. You can pray about the issue together, they can hold you accountable, they may even be able to suggest an effective strategy to help you overcome the issue. As a Church, we are the body of Christ, and much like parts of a body, we aid each other, and are useless alone.