Dark, mushy, or sunken spots on the skin
Skin that looks shriveled or very wrinkled
The avocado feels overly soft or mushy when gently squeezed
A sour, rancid, or fermented smell
Brown, gray, or black flesh throughout
Stringy, slimy, or watery texture inside
Mold on the skin, stem area, or flesh
The stem comes off and the area underneath is brown or black
A bitter, sour, or off taste
Large areas of discoloration after cutting open