How to stimulate hair growth: factors, medical options and when to see a specialist

What influences how your hair grows

Each hair grows in cycles: a long growth phase, a short transition and a resting phase, after which the hair is shed and a new one starts to grow from the same follicle. Losing a certain number of hairs every day is normal. Problems begin when the growth phase becomes shorter, the hair becomes finer or fewer follicles produce new hair.

Many factors act on this cycle together, some from within the body and some from outside. Their combination is different for every person, which is why the same advice works well for one person and does little for another.

Internal factors

• Heredity. Genes largely determine the thickness, texture and density of hair, as well as the tendency towards pattern hair loss.
• Hormones. Hormonal changes and sensitivity of follicles to certain hormones can shorten the growth phase and make hair finer over time.
• Nutrition. Hair needs protein, essential fatty acids, iron and other micronutrients. A real deficiency can affect hair, but extra supplements do not usually help if nothing is lacking.
• Age. With age, follicles naturally change, and hair often becomes thinner and grows more slowly.
• General health. Thyroid disorders, anaemia, recent illness, surgery or severe stress can all show up in the hair, often with a delay of a few months.

External factors and everyday habits

• Hair care. Harsh chemical treatments, frequent bleaching, tight hairstyles and a lot of heat styling can damage the hair shaft and, in some cases, the follicles.
• Environment. Strong sun, dry air and pollution affect the scalp and the condition of the hair.
• Diet and fluids. A varied diet and enough fluids support the body as a whole, and hair is part of it.
• Lifestyle. Regular sleep, moderate exercise, not smoking and managing stress help keep the body, and with it the hair, in better condition.

Good habits create favourable conditions, but they do not change genetics. Home masks, oils and vitamins can make hair feel nicer, yet there is no reliable evidence that they restore follicles that have stopped working. If hair loss is noticeable, it is better to find out its cause than to try one product after another.

Medical approaches doctors may consider

There is a range of treatments that specialists in hair and scalp problems may offer. Each has its own indications and limits, and none of them suits everyone. Which option is reasonable, if any, is decided by a doctor after an examination.

Scalp injections (mesotherapy)

Small amounts of solutions containing vitamins, trace elements and other active substances are injected into the scalp. The aim is to support the nutrition of the hair roots. The evidence varies between products, and results differ from person to person.

Platelet-rich plasma (PRP)

A small amount of the patient's own blood is processed to concentrate platelets, and the plasma is injected into the scalp. It is thought to support repair processes in the tissue. PRP is sometimes used on its own and sometimes alongside a hair transplant.

Low-level laser therapy

Low-intensity light is used with the aim of stimulating activity in the follicles. It is generally well tolerated, but it usually requires regular sessions over a long period, and the effect is modest in many cases.

Microneedling

Very fine needles create tiny punctures in the scalp to trigger natural healing and collagen production. It should be done with sterile equipment and is not suitable for an inflamed or irritated scalp.

Medication

For some types of hair loss, medicines applied to the scalp or taken by mouth can slow shedding and support growth. They are used only as prescribed by a doctor, who takes into account the diagnosis, possible side effects and other medication you take. Stopping treatment usually means the effect gradually wears off.

Hair transplantation

A transplant does not stimulate existing follicles. It moves follicles from the donor area at the back and sides of the head, where hair is usually more resistant to pattern loss, to areas where it has thinned. The FUE method is used for androgenetic alopecia, and the combined FUE and DHI approach is used both for androgenetic alopecia and to add density. A transplant does not treat the cause of hair loss, so doctors often recommend supporting the remaining native hair as well. You can read more on the hair transplant page.

When it is time to see a specialist

Not every change in hair or scalp can be fixed with a new shampoo. It is worth seeing a dermatologist or another doctor who deals with hair problems if you notice any of the following:

1. Increased shedding that is clearly above your usual level and lasts for more than a few weeks.
2. Thinning or reduced density, especially in particular areas such as the crown, the temples or the parting.
3. Changes in hair quality: hair becomes brittle, dry and fine despite careful care.
4. Scalp problems such as persistent itching, redness, flaking, pain or patches of hair loss.
5. No response to usual care: well-known products have had no effect for several months.
6. A family history of early hair loss, when you want to understand your own risk early.

Sudden hair loss in patches, hair loss with other symptoms such as fatigue or weight change, or scarring on the scalp should be checked by a doctor without delay. An early diagnosis gives more options and helps avoid spending time and money on methods that do not suit your situation.

Consultation at City Medical Centre

City Medical Centre works with international patients who are considering a hair transplant. The first consultation is free and can be held online: send photos of your hair and donor area, and the doctor will assess whether a transplant is a reasonable option in your case. The cost is named after this assessment and is fixed in the contract. A personal coordinator stays with you from your first message to the end of recovery, and photos and questions can be sent by WhatsApp. Find out more on the hair transplant page.

Frequently asked questions

Can vitamins or hair masks make hair grow faster?

They can support hair if the body genuinely lacks certain nutrients, and masks can improve how hair feels. However, there is no reliable evidence that they restore follicles that have stopped producing hair. If shedding is noticeable, it is better to see a doctor and find the cause.

Which treatment is best for stimulating hair growth?

There is no single best option. Scalp injections, PRP, laser therapy, microneedling and medication each have their own indications and limits. The choice depends on the type and cause of hair loss and is made by a doctor after an examination.

Can I take medication for hair loss without a doctor?

Medicines for hair loss should be used only as prescribed by a doctor. They are not suitable for every type of hair loss, they can have side effects, and the doctor needs to take into account your health and any other medication you take.

Does a hair transplant stimulate hair growth?

No. A transplant moves follicles from the donor area to thinning areas, where they usually continue to grow. It does not treat the cause of hair loss, so native hair may keep thinning, and doctors often recommend additional care for it.

When should I see a doctor about hair loss?

See a doctor if shedding is clearly increased for several weeks, hair is thinning in specific areas, the scalp is itchy, red or painful, or you notice patches of hair loss. Sudden or patchy loss should be checked promptly.