If you mean like it's not a matching color (everyone has pale head regardless of skin color)
1.Go to your Fallout.ini (Users/Your Name/Documents/My Games/FalloutNV)
2.Go to it's properties and deselect read-only
3.Open Fallout.ini, it's a text file
4.Right under "STestfile=FalloutNV.esm" type: bLoadFaceGenHeadEGTFiles=1
It should look like this:
- Spoiler:
[General]
SStartingCell=
SCharGenQuest=00102037
SStartingCellY=
SStartingCellX=
SStartingWorld=
STestFile10=
STestFile9=
STestFile8=
STestFile7=
STestFile6=
STestFile5=
STestFile4=
STestFile3=
STestFile2=
STestFile1=FalloutNV.esm
bLoadFaceGenHeadEGTFiles=1 <-------- This line is what you need to add
5. Remember to save it
You might have to do this again in the future, because the Fallout.ini sometimes resets
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A secret message to the chosen ones:- Spoiler:
011010000111010001110100011100000111001100111010001011110010111101110111011101110111011100101
110011110010110111101110101011101000111010101100010011001010010111001100011011011110110110100
101111011101110110000101110100011000110110100000111111011101100011110101100100010100010111011
10011010001110111001110010101011101100111010110000110001101010001