Hi I am pretty new to the hobby. What are the indications of discus that have internal parasites? is razor-head are the aftermath of long term internal parasites problem? is there any indications on the front head shape to foresee razor-head?

here are front photos two of my discus. any particular one look unhealthy?

thank you in advance for taking the time to read this.

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WhatsApp Image 2020-12-22 at 22.03.00.jpeg