Worrying Colour Change.

[372xp]

My male h/m was in hiding last week. when he emerged he did so without a dorsal fin. I treated with eSHa2000 for 3 days then onto a 25% daily water change. Today I noticed a red/pink patch spreading down his back, on his head is a orange/brown patch appearing. This seems to be a discolouration of his scales rather than a wound or sore patch. He is back to his normal inquisitive self. He feeds well, I hand feed him 7 Hikari betta gold pellets twice a day one at a time, he eats them all. Every 2 days I give him a few brine shrimp. I have turned up the temp to 80. He has a 45ltr planted tank shared with 2 ottos (they wont be enjoying the temp).Are these symptoms of the injury or something else?
URL=http/s1339.photobucket.com/user/sbembassy/media/IMG_20140524_204406_zps54746857.jpg.html]

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His tankURL=http/s1339.photobucket.com/user/sbembassy/media/IMG_20140524_203119_zps8e1962a2.jpg.html]

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You can see the new fin growing back
bad picture but you can see the reddening
Him yesterday

 

[Wildbetta]

Do you know how he injured himself?  Can you get a better picture of the wound/patch on his back?  Hopefully it is not something more troubling than a healing wound but watch it carefully.
 
On another note, your boy is quite chunky.  I recommend lessening how much you are feeding him.

 

[372xp]

Dont know how he did it, he makes his nest by the heater and hangs out there. Maybe it got burned. I will ry to get a top down picture.

 

[372xp]

here are some better pictures of his discolouration
What causes this loss of pigmentation?