When I first got my hair cut as I started going curly, I had this problem. For me, it is a combination of 1) my hair being finer underneath so there is less weight to pull it down; 2) my hair hitting my collar which causes the underneath hair to bunch up; and 3) a big nasty cowlick near the nape of my neck. My fix was to take two duck bill clips – stretch my underneath hair down and put one on the right and left side to hold it in place. Then I would diffuse the area for about 5 minutes. That helped A LOT.
Now that my hair has grown in a couple of inches, there is enough weight to pull down on its own – except for the nasty cowlick which still puffs up my hair unless I tame it.
High Density, High Porosity, Medium Texture, 3B with some kink
DT: SS DDMT - HG
Lo-Poo: No Preference
Co-wash: CJ Smoothing Conditioner
RO: CJ Strengthening Conditioner - HG
LI: CK Satin Roots
Styler: CK Coil Jam
Other Likes: Castor Oil; CK Twist Whip, MD CSC
Dislikes: Wheat Protein; Aloe LIs or Stylers