Is it normal that my temps go up from 50 degrees Celsius to 90-100 when starting FM?
That is high. If it is CPU temp that is reaching that level I would seriously get it checked out. Temps vary depending on the spec of the machine, but in any case touching 90-100, especially 100 is crazy high
I had same issue. I had to buy a laptop chill mat which has worked wonders..
Targus AWE55EU Laptop Cooling Pad 2 fans laptop cooler fits 15"-17": Amazon.co.uk: Computers & Accessories