There’s a difference between messy hair and hair that looks like you forgot a brush existed, and the best medium length messy styles live right on that line. The trick isn’t skipping product, it’s using the right amount of the wrong-looking product, texture spray instead of smoothing serum, so strands separate instead of clump. Medium length is honestly the easiest range to pull this off in, long enough to have movement, short enough that it doesn’t just go flat under its own weight.
Undone Beach Waves

Salt spray applied to damp hair before air drying gives you the base for this one. Twist small random sections while drying instead of using a curling wand for a more natural, uneven wave pattern. Finish with a texturizing spray at the roots for lift. The goal is waves that look sun-earned, not salon-set, with pieces falling slightly out of rhythm from each other.
Messy Shag

Choppy, face-framing layers cut throughout the mid-lengths give this cut built-in texture, so it does a lot of the work for you. Blow dry with a round brush pointing ends outward, then rough up the crown with your fingers and a texturizing paste. Collarbone-length shags especially benefit from this style since the layers have room to move without losing shape.
Loose Messy Bun

Gather hair low at the nape without smoothing every flyaway into place first. Twist once, tuck loosely, and pull a few face-framing pieces back out. A claw clip works better than an elastic here since it holds shape without cinching everything too tight. Pancake the bun slightly by pulling at the edges once it’s secure for extra volume.
Piecey Textured Bob

For medium bobs sitting around the collarbone, a matte texturizing cream applied to dry hair and scrunched upward creates that separated, piece-by-piece look. Avoid brushing after styling, finger comb instead to keep the definition. This works especially well on hair with a slight natural wave since the cream just enhances what’s already there.
Messy Fishtail Braid

Loosen a fishtail braid by gently pulling apart the woven sections once it’s fully braided, working from bottom to top. The looser and more uneven the tugging, the better it looks. Leave a few pieces out around the hairline before you start braiding so the finished style doesn’t read too polished or precise.
Wolf Cut with Rough Texture

Heavy layering through the crown paired with shorter face-framing pieces gives the wolf cut its edgy, undone shape by default. Apply a light hold texture spray and scrunch upward while diffusing to encourage separation. Skip the flat iron entirely here, this cut is built to look better with a little chaos left in.
Messy Half-Up Twist

Twist two small sections from the front and pin them loosely at the crown, leaving the rest down and untouched. Pull a few strands free from the twists for softness. This is a fast option that still looks intentional, especially on second or third day hair where natural oils help everything hold texture better.
Rough Dried Waves

Instead of styling wet hair, apply a curl cream and let it air dry completely untouched, then rough it up with your hands once dry. This creates uneven, low-effort waves that look more like natural texture than a styled result. It works best on hair with some natural bend already, fine straight hair may need a texture spray boost.
Messy Space Buns

Two buns twisted loosely rather than wrapped tight give a softer, undone version of this style. Let a few pieces fall around the face and don’t smooth the parting between them too precisely. Medium length hair works well here since there’s enough length to twist without the buns sitting too small or tight against the head.
Tousled Layers with Curtain Fringe

Curtain bangs blended into longer layers around the face create movement without a defined part line. Blow dry with your fingers instead of a brush, twisting sections randomly as you go. A light pomade worked through the ends only keeps things soft without weighing the layers down or erasing the tousled shape.
Undone Low Ponytail

Pull hair back loosely at the nape, leaving some face-framing pieces out and not smoothing the crown flat first. Wrap a small section of hair around the elastic instead of using a hair tie visibly. This works particularly well on medium length hair since the tail has enough weight to sit naturally without needing extra product to hold shape.
Messy French Braid Pigtails

Loosen a French braid on each side after braiding, pulling gently at the edges to widen the plaits. Leave the ends slightly frizzy rather than sealing them smooth. This style reads more current when the braids are slightly asymmetrical rather than perfectly matched, so don’t worry about making both sides identical.
Scrunched Natural Texture

For hair with any natural wave or curl pattern, apply a curl enhancing cream to soaking wet hair and scrunch upward with a microfiber towel. Let it air dry or diffuse on low heat. This is less a “created” style and more an enhanced version of what your hair already wants to do.
Messy Low Bun with Braid Wrap

Instead of wrapping a section of hair around your bun’s elastic, braid it first, then wrap it around loosely. This adds texture without extra effort. Pull the bun itself apart slightly once secured for a fuller, less compact shape. Works well for second-day hair where some grip already exists.
Undone Blowout with Texture Spray

Blow dry hair mostly straight but skip the final smoothing pass with a flat iron or brush. Apply texture spray at the mid-lengths and ends, then tousle with your hands. This gives you the volume of a blowout without the polished, salon-fresh finish, more lived-in than freshly styled.
Messy Twisted Half-Up with Volume

Twist small sections starting at the temples and pin them together at the back of the crown, then gently pull the twists apart for texture. Backcomb slightly at the root before twisting for extra lift. Leave face-framing pieces loose on both sides so the finished look doesn’t feel too structured or symmetrical.