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Why do new moles appear on the body

by Alivia Nyhan
Published: Last Updated on

A person’s age, race, and genetics, as well as other factors, can determine the presence of moles on the body. Many of them are present from birth and others are new moles that appear over the years.

The appearance of new moles on the body usually generates uncertainty in the people who have them, since many questions have been created regarding the subject. Its appearance, color, shape and growth are medical parameters to take into account when evaluating the appearance of new moles.

In this FastlyHealarticle, you will learn the answer to why new moles appear on the body and what to do to avoid worrying about their appearance.

Why do new moles appear

There are multiple factors that trigger the appearance of moles and knowing them will help you understand why new moles appear on the body.

Genetic factors

Genetic inheritance has to do directly with the physical appearance of people, so that moles are involved with it. These types of moles can be passed from parents to children, which is why many people consider it a family brand.

Excessive exposure to ultraviolet rays

Another of the most common causes of the appearance of new moles is sun exposure. The sun’s rays directly influence melanin , through it multiple changes are obtained in:

  • The coloring of the skin, which influences the tan.
  • The appearance of freckles.
  • The appearance of spots on the skin.
  • Appearance of new moles by the sun.

Excessive sun exposure is one of the most frequent factors that answer the question: “Why do new moles appear on the skin?” That is why, at the end of the summer, it is common to notice new moles from the sun.

Some stages of life

Some life stages are more prone to the appearance of new moles. For example, adolescence is a stage exposed to great hormonal changes in which an increase in the concentration of maritime cells may appear, which are responsible for causing the appearance of moles.


During pregnancy, new moles are also common due to hormonal changes in women. In addition to new moles, some existing moles can grow and darken. In these cases, it is recommended to visit the dermatologist before any warning sign such as:

  • Itching in mole.
  • Pain in mole.
  • Color changes in moles.
  • Bleeding
  • Overgrowth.

Menopause and andropause

Both menopause in women and andropause in men are subject to hormonal changes that can trigger the appearance of new moles on the body. For this same reason, it can also cause changes in size and color of existing moles.

Immune system depression

Another factor that can explain why new moles appear in the body is the presence of some autoimmune diseases, as well as people with some nutritional deficit. The weakness of the immune system increases the predisposition to the appearance of new moles on the body.

Intake of some medications

Several drugs have been associated with the generation of new moles on the skin, such as immunosuppressants , which are responsible for depressing the immune system. The use of some biological substances such as monoclonal antibodies, also called biological therapies , are used in patients with inflammatory diseases such as psoriasis , rheumatoid arthritis and ulcerative colitis.

The following medications can also cause new moles on the skin as side effects:

  • Antibiotics
  • Antidepressants
  • Hormones

Anti-cancer treatments

Both chemotherapy and radiation therapy are treatments used to fight cancer. Both anticancer treatments predispose the appearance of new spots and moles on the skin, among other things, due to a depression of the immune system.

Stages of life in which new moles appear

Moles appear on the body progressively from childhood or during adolescence in various places such as the trunk and extremities. The areas where it is not so frequent that new moles appear are:

  • The palms of the hands.
  • Soles of the feet.
  • Mucous membranes of the mouth.
  • Genitals.

In some white people and people of European descent, new moles have appeared in the third decade of their lives, much more frequently in women than in men, unlike black people where the number of moles is less.

It is common to see the appearance of new moles in:

  • Young people under 35 years of age.
  • Pregnant women.
  • At the end of the summer.
  • After taking some medications that stimulate melanin production .

It is important to remember that as the presence of moles on the body increases, the risk of malignant moles also increases. For that reason, it is so important to identify whether the new mole is benign.

What types of moles are dangerous?

The appearance of new moles on the body is not dangerous, but it is synonymous with the fact that some vigilance must be established in them. Not all are malignant moles, there are some so-called atypical moles that should be followed up with respect to certain characteristics that they present:

  • Presence of bleeding.
  • Ragged edges.
  • They are of different colors.
  • Its growth is fast and its diameter is greater than 6mm.

If you think “I get a lot of new moles” it is important that you regularly consult with the dermatologist about the appearance of these and determine why new moles appear on the body. It is important to identify new moles and whether they are dangerous, because if there are more than 50 moles on the body, you may be at risk for skin cancer .


The dermatologist is the specialist you should go to to determine if they are benign moles and rule out whether they are malignant moles, also known as melanoma . To do this, an early diagnosis and analysis of new moles is required using digital dermoscopy . This is a modern non-invasive method, currently used to monitor them, in addition to offering an early diagnosis of any type of lesion that could become malignant.

If you want to know some of the characteristics that serve to detect a malignant mole, you can consult the article Tips to detect a malignant mole .

Do not hesitate to go to your dermatologist, he will be the one to guide you in the monitoring of moles and answer your question why new moles appear on the body.

This article is merely informative, at FastlyHeal .com we do not have the power to prescribe medical treatments or make any type of diagnosis. We invite you to see a doctor in the case of presenting any type of condition or discomfort.

If you want to read more articles similar to Why do new moles appear on the body , we recommend that you enter our Skin, hair and nails category .

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