A sew-in typically lasts 6 to 8 weeks before it needs maintenance or removal

A sew-in weave can stay in your hair for 6 to 8 weeks under normal conditions. After that window, the hair extensions begin to slip because your natural hair has grown out at the roots, creating distance between the braided cornrows and the wefts (the sewn tracks). The longer you wait past 8 weeks, the more stress you place on your natural hair and scalp, and the higher the risk of breakage or traction alopecia—permanent hair loss from constant pulling.

The exact timeline depends on how fast your hair grows, how well you maintain the install, and how active you are. Someone with very fast-growing hair might need a touch-up at 5 weeks. Someone with slower growth and excellent care habits might stretch it to 9 weeks. But 6 to 8 weeks is the safe window most stylists recommend, and staying within it protects both the sew-in and your natural hair underneath.

Key Takeaways

  • Sew-ins last 6 to 8 weeks before the roots grow out enough to loosen the tracks and create tension on your scalp.
  • Sleeping on a silk or satin pillowcase, tying your hair down at night, and avoiding excessive pulling all extend the life of your install.
  • Washing your hair every 7 to 10 days with sulfate-free shampoo keeps the weave clean without weakening the braids underneath.
  • Leaving a sew-in in longer than 10 weeks significantly increases the risk of breakage and permanent damage to your natural hair.

What happens to your hair as a sew-in ages

When you first get a sew-in, the braided cornrows are tight against your scalp and the wefts sit snugly on top of them. As your natural hair grows, it pushes the braids away from your scalp—usually about a quarter inch per week, depending on your growth rate. This creates slack in the system. The wefts start to shift, and the tension that was once distributed evenly across your scalp becomes concentrated in smaller areas.

Around week 6 or 7, you will notice the tracks moving when you touch them, or your scalp feeling tender in certain spots. This is your signal that the install is aging. If you ignore it and keep the sew-in in for 10, 12, or 14 weeks, the constant micro-movements and uneven tension can damage the hair follicles themselves, leading to breakage that may not grow back for months.

Signs your sew-in needs to come out or be tightened

The most obvious sign is visible movement in the tracks. If you can lift the weft away from your scalp by more than a quarter inch, the install is too loose. You may also feel itching or soreness along the braided lines, especially if you sleep on that side. Some people notice their edges (the hair at the hairline) starting to thin or break, which means the tension has become too much for that delicate area.

Another sign is buildup at the base of the braids. Even with regular washing, product, sweat, and dead skin cells accumulate where the wefts meet the braids. After 6 to 8 weeks, this buildup can trap moisture and create an environment where fungal or bacterial growth becomes likely. If you notice an odor, flaking, or itching that does not go away after washing, it is time to remove the sew-in.

How to extend the life of your sew-in safely

The best way to reach 8 weeks without damage is to reduce the stress on your natural hair and braids. Sleep on a silk or satin pillowcase instead of cotton—cotton absorbs moisture and creates friction that weakens both the extensions and your natural hair. Tie your hair down loosely with a silk scarf or bonnet before bed to prevent the sew-in from shifting while you sleep.

Wash your hair every 7 to 10 days using a sulfate-free shampoo and cool water. Sulfates strip moisture from hair and can weaken the bonds holding the wefts in place. When you wash, focus the shampoo on your scalp and the base of the braids, not on the hair extensions themselves. Rinse thoroughly, because leftover shampoo residue hardens and creates buildup faster.

Avoid tight hairstyles, excessive heat styling, and pulling on the wefts. If you style your sew-in into a ponytail or bun, keep it loose—tight pulling accelerates the damage to your edges and natural hair. Use a heat protectant spray if you blow-dry or flat-iron the extensions, and keep the heat below 350°F to avoid melting the hair fibers.

The difference between a touch-up and full removal

Around week 6 or 7, your stylist can perform a touch-up instead of removing the entire sew-in. A touch-up means taking down only the braids that have loosened the most (usually at the front and sides where tension is highest), re-braiding them closer to the scalp, and re-sewing the wefts. This process takes 1 to 2 hours and costs less than a full install. It gives you another 3 to 4 weeks of wear without the damage that comes from leaving a loose sew-in in place.

A full removal means taking out all the braids and wefts, washing and conditioning your natural hair, and either getting a fresh install or taking a break. Full removal takes 2 to 4 hours depending on how many tracks were sewn in. Most stylists recommend doing a full removal every 12 to 16 weeks—meaning two touch-ups followed by a removal—to give your natural hair time to recover and to prevent cumulative damage.

What happens if you leave a sew-in in too long

Leaving a sew-in in for longer than 10 weeks puts you at serious risk. The loose braids and shifting wefts create constant tension on your hair follicles, which can lead to traction alopecia—permanent hair loss in the areas under the most stress, usually along the hairline and temples. This type of damage is not always reversible, and the longer you wait, the less likely your hair will grow back.

You also risk matting and tangling of your natural hair underneath the braids. Once your hair mats, it becomes nearly impossible to comb out without cutting it. The longer the sew-in stays in, the more moisture and buildup accumulate at the base of the braids, creating an ideal environment for mold or mildew to grow. This can cause itching, flaking, and even infection if left untreated.

Taking care of your hair after removal

After your sew-in comes out, your natural hair needs recovery time. Wash it gently with a moisturizing shampoo and deep condition for at least 15 to 20 minutes. Your hair will likely feel dry and fragile because it has been under tension and covered for weeks. Use a leave-in conditioner and avoid heat styling for at least a week.

If you plan to get another sew-in, wait at least 1 to 2 weeks between removal and the next install. This gives your scalp time to breathe and your natural hair time to regain moisture and strength. If your edges are thinned or broken, give them extra time—sometimes 4 to 6 weeks—before putting tension back on them with another sew-in.

Frequently Asked Questions

Can I keep a sew-in in for 12 weeks if I take really good care of it?

Taking good care of it helps, but 12 weeks is still too long for most people. Even with perfect maintenance, your hair grows about an inch in that time, which creates significant slack and tension on your scalp. The risk of traction alopecia and breakage increases sharply after week 10. If you want to wear a sew-in longer, plan for a touch-up at week 6 or 7 instead.

What if my sew-in feels fine at week 8—can I leave it in longer?

Feeling fine does not mean it is safe. Damage from tension often happens without obvious symptoms until it is too late. By week 8, your natural hair has already been under stress for weeks, and the risk of permanent damage increases daily. Stick to the 6 to 8 week window even if everything feels comfortable.

How much does a touch-up cost compared to a full install?

Prices vary by location and stylist, but a touch-up typically costs 40 to 60 percent of what a full install costs. If a full sew-in costs $150 to $300, expect a touch-up to run $60 to $180. The exact price depends on how many braids need to be redone and how much new hair needs to be added.

Will my natural hair grow back if I get traction alopecia from a sew-in?

If caught early, yes—stopping the tension allows hair to regrow over several months. But if the damage is severe or has been happening for a long time, the hair follicles may be permanently damaged and regrowth may be limited or impossible. This is why staying within the 6 to 8 week window is so important.

Can I wash my sew-in every day?

Washing every day is too frequent and can weaken the braids and wefts faster. Every 7 to 10 days is the recommended schedule. If your scalp gets very oily or sweaty, you can rinse with water between washes, but use shampoo only once a week to avoid stripping moisture and destabilizing the install.