itchy spots on skin - high AST, ALT

It's almost 2 years I'm suffering from itching in different areas of my body (e.g. on my righ thigh, hips, back) the area turns to become darker than it's normal and it starts itching bad. by the time it become much more darker and larger so much more itchy.
A year ago I start exercising and my coach told me to take Liv52 from Himalaya labs, I've taken the tablets for almost 9 month. after a while all areas were vanished and became normal so it wasn't itchy anymore.

After I have stopped taking tablets it all came back. I took a test and everything is perfect except ALT and AST. They are off the chart.
AST= 288
ALT= 161

I don't really know what to do. I asked a doctor and he went like it's nothing don't worry. It's really bugging me.