After PRP hair treatment, the most important thing you can do is leave your scalp alone for the first 24 hours. That means no washing, no touching, no products, and no sweating. The injected platelet-rich plasma needs time to settle into the scalp and begin releasing growth factors that stimulate hair follicles. What you do in the hours, days, and weeks following treatment directly affects how well it works.
The First 24 to 48 Hours
Your scalp will likely feel sore and may look slightly red or bruised at the injection sites. This is normal and typically resolves within a day or two. Resist the urge to touch, rub, or scratch the treated area, even if it’s tender.
During this window, avoid washing your hair or getting your scalp wet. When you do wash after at least 24 hours, use lukewarm water and a mild, sulfate-free shampoo. Be gentle. No scrubbing, no hot water, no vigorous towel drying. Skip styling products for the first couple of days as well.
If you need to go outside, wear a wide-brimmed, breathable hat. Your scalp is especially sensitive to UV rays right after treatment, and sun exposure can cause inflammation that interferes with the healing process. Keep the treated area shielded from direct sunlight for at least 48 to 72 hours.
Skip the Painkillers You’d Normally Reach For
This is one of the most commonly overlooked aftercare rules. Do not take ibuprofen, naproxen, aspirin, or other common anti-inflammatory painkillers (NSAIDs) after PRP treatment. These drugs reduce platelet aggregation, which is the exact mechanism PRP relies on to work. Platelets need to clump together at the treatment site to release the growth factors that stimulate your hair follicles. Even a single dose of certain NSAIDs can significantly suppress this process.
Research published in Biomedicines found that patients who took common NSAIDs like diclofenac or dexibuprofen showed measurably decreased platelet aggregation compared to those who took a placebo. Naproxen use specifically reduced levels of key growth factors, and those levels didn’t normalize until a full week after stopping the medication. If you need pain relief for the soreness, acetaminophen (Tylenol) is generally considered safe because it doesn’t interfere with platelet function. Ask your provider to confirm what’s appropriate for you.
Exercise and Physical Activity
Hold off on strenuous exercise for at least 48 hours, and ideally for one to two weeks. Heavy sweating can irritate injection sites on the scalp, and intense physical activity increases blood flow and inflammation in ways that may limit how effectively the platelets do their job. The goal during this period is to let the growth factors work undisturbed.
Light walking is fine after the first day. But anything that gets your heart rate up significantly, like running, weightlifting, hot yoga, or cycling, should wait. When you do return to exercise, ease back in gradually rather than jumping straight to your normal intensity.
Alcohol, Smoking, and Blood Flow
Both alcohol and nicotine impair blood circulation to the scalp, and healthy blood flow is essential for delivering nutrients to hair follicles during recovery. Avoid alcohol and smoking for several days after your session. Smoking is particularly counterproductive because it constricts blood vessels and reduces oxygen supply to the scalp, directly working against what PRP is trying to accomplish.
Hair Styling, Dye, and Chemical Treatments
For the first few days, avoid high-heat styling tools like blow dryers, flat irons, and curling irons. The scalp needs time to recover from the micro-injuries caused by the injections, and heat adds unnecessary irritation.
If you color your hair, wait at least two to four weeks before applying dye or any chemical treatment. Hair dyes, perms, and relaxers contain harsh chemicals that can inflame the scalp and potentially undermine the regenerative effects of PRP. Plan your coloring schedule around your treatment dates so you’re not stuck waiting longer than you’d like.
Sleeping After Treatment
On the night of your treatment, try to avoid putting direct pressure on the treated areas of your scalp. If the injections were concentrated at the crown, sleeping on your back is ideal. If your hairline was the focus, a slightly elevated position using an extra pillow can help minimize any mild swelling. This isn’t something you need to maintain for more than a night or two.
When You’ll Start Seeing Results
PRP hair restoration is a slow process, and managing expectations during the first couple of months is important. For the first eight weeks, you won’t see visible new growth. What you may notice during this phase is reduced hair shedding, which is actually a positive early sign that the treatment is working at the follicle level.
Between months two and four, fine new hairs begin to appear in the treated areas. These are often thin and light-colored at first. By months four through eight, those hairs thicken and darken, and you’ll start to see a genuine improvement in density. This is when most people notice a clear difference in before-and-after photos.
Peak results typically arrive between eight and twelve months after starting treatment. The full timeline means patience is essential. If you’re only a few weeks in and feel discouraged, that’s completely expected. The biological process of reactivating dormant follicles and growing new hair simply takes time.
How Many Sessions You’ll Need
A single PRP session isn’t enough for most people. The standard protocol involves four to six initial sessions, spaced about four to six weeks apart. This series builds on itself, with each treatment reinforcing the growth signals from the last.
After completing the initial series, results typically last between six months and a year before gradually fading. To maintain what you’ve gained, most providers recommend periodic maintenance sessions. The frequency varies from person to person depending on how your hair responds, but returning once or twice a year is common. Skipping maintenance means the improvements will slowly diminish as the growth factor stimulation wears off.
What Helps Between Sessions
The weeks between PRP sessions are an opportunity to support your scalp’s recovery through basic healthy habits. Staying well hydrated, eating a protein-rich diet, and getting adequate sleep all contribute to the biological environment your hair follicles need to respond to treatment. Some providers also recommend continuing with a sulfate-free shampoo long-term, as harsh detergents can irritate the scalp and strip natural oils that protect healing follicles.
If you’re using other hair loss treatments like minoxidil, check with your provider about when to resume application after each PRP session. Most recommend waiting at least 24 hours, but the timing can vary depending on your specific treatment plan.