Information checked 25 October 2026. General information, not individual medical advice.
Do I need to restart PRP if I miss a hair treatment session?
There is no universal evidence-based restart rule that applies to every missed appointment. Contact the treating clinic with your treatment dates and the reason for the delay. PRP schedules differ, and the clinician should decide whether to continue, adjust or reassess the plan. Do not assume that one late appointment has wasted the course or that an extra treatment is automatically necessary. [1,2]
Why there is not one timetable for everyone
The American Academy of Dermatology describes a commonly used pattern of monthly appointments for three months, followed by sessions every three to six months. Its professional educational review also notes the lack of a universally agreed method for PRP preparation and administration. A common schedule is not proof that every deviation causes treatment failure. [1,2]
Separate a scheduling problem from a clinical change
Tell the team whether the delay is simply travel or diary pressure, or whether you have become unwell, started a medicine or developed a new scalp problem. Those facts may change what needs checking before the next procedure. Do not stop prescribed treatment to keep a PRP date. Ask the clinician for instructions relevant to your circumstances.
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Bring the dates, not just the package name
List the dates of completed sessions, the planned date that was missed, any response you have noticed and other changes in the treatment plan. If you are moving clinics, ask how to provide the previous treatment record. A package title does not describe exactly what preparation was used or how progress was assessed. [2]
What to ask about another appointment
Ask whether the next step is another injection or a review first, whether the original diagnosis still fits and how the delay affects the planned comparison point. Ask what evidence supports any recommendation for additional sessions. An honest answer may include uncertainty. A missed date alone should not be presented as proof that you need to buy an entirely new course.
Keep the financial question separate
Ask whether an unused appointment remains available, whether a change attracts a fee and whether the original quote still applies. These are clinic-specific terms, not medical rules. Obtain the current answer before paying. Do not assume that a package can be extended, transferred or refunded because another clinic permits it.
Plan around a schedule you can keep
Contact The London PRP Clinic by The Wellness to discuss a delayed appointment or a new hair-loss assessment. Explain any upcoming travel or diary constraints before starting treatment. The useful outcome is a realistic sequence of assessment, treatment if appropriate and review, with the costs and conditions clear from the outset.
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What trial evidence can and cannot answer
Randomised trials can inform a discussion about PRP for diagnosed androgenetic alopecia. They do not establish one universal rescue timetable for a missed appointment. A 2023 systematic review of nine trials reported an advantage in hair density over placebo at three and six months, but that does not tell a clinician exactly how a particular delay affects your course. Do not convert a study follow-up date into a rigid deadline for every patient. [3]
Why the treatment record matters
A 2024 review found substantial differences between PRP studies and low-quality evidence for hair-density outcomes. That is one reason a clinician needs the actual treatment history rather than assuming all courses are interchangeable. If you are transferring care, ask the previous clinic for the dates and treatment record. The receiving clinician can then explain what is known, what remains uncertain and whether another assessment is needed. [4]
Separate the review date from the injection date
If photographs or a clinical review were planned for a particular stage, ask whether that assessment should still take place even if an injection has been delayed. A review and another procedure are not the same service. Explain any continuing shedding, new scalp symptoms or concern about progress. The clinician should decide whether the right next step is to document progress, investigate a change or continue treatment.
If travel or work will interrupt the next few months
Give the team the dates you can realistically attend before starting or continuing a course. Ask whether the proposed schedule is practical, what happens if another appointment moves and how to contact the clinic if your health changes. Avoid booking a course solely because the package looks attractive if the timetable cannot work for you. Clear expectations at the start can prevent a scheduling problem becoming an unnecessary purchase.
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A practical message to the clinic
Include the dates of completed sessions, the missed appointment, your current concern and the dates you could attend next. Ask whether you need a review before another procedure and whether any extra charge is proposed. Do not include sensitive records in a public comment. The London PRP Clinic by The Wellness can discuss the next step and explain the current appointment terms before you commit.
Common questions
Will one delay definitely stop PRP working? That cannot be concluded from a missed date. Should I double up the next treatment? Only a treating clinician should decide the procedure plan. Is maintenance the same as restarting? No: ask which phase of care is proposed and why. Can another clinic continue my course? Ask for a record review and a fresh suitability decision. [1,2]
Sources
American Academy of Dermatology, hair-loss treatment and PRP schedules
American Academy of Dermatology, PRP for alopecia, Summer 2024
Journal of Cutaneous Medicine and Surgery, PRP for androgenetic alopecia, systematic review (2023)
Anais Brasileiros de Dermatologia, systematic review and meta-analysis (2024)
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