Yes, if you have dampness and mould, it can affect health in the home; you’re more likely to
have respiratory problems, respiratory infections, allergies or asthma
Damp and mould can affect health, as they may affect the immune system
Some people are more sensitive than others, including:
Babies and children.
Those with a weakened immune system.
Existing skin problems, such as eczema.
Respiratory problems, such as allergies and asthma.
These individuals should avoid exposure to dampness and mould.

How does it affect your health?
Moulds produce allergens (substances that can cause an allergic reaction), irritants, and sometimes toxic substances. Inhaling or touching mould spores may cause an allergic reaction, such as sneezing, a runny nose, red eyes and skin rash. Moulds can also cause asthma attacks.

Cause:
Excess water in your building. You must arrange for an investigation to identify and rectify the defects. High humidity in the atmosphere is the leading cause of mould growth. Also, penetrating damp (rain) or water vapour which condenses into a liquid on a cold surface (Dew point).
Showering is like a tropical rainstorm, and moisture vapour moves quickly into a colder room due to temperature and air-pressure differences. This is one of the common causes of mould in bedrooms. Drying your Laundry on radiators has a similar effect. Poor building maintenance, i.e. leaking pipes and penetrating damp, will increase the relative humidity.
After investigation
Actions must be taken to control the excess water generated. Typically, the ideal relative humidity range is 45 to 60% at 20 °C, achieved through balanced heating and ventilation, which help manage excess water vapour and ensure good building maintenance.
You may need a professional to remove mould for you, but if it’s only a small amount, i.e. less than 1m2 in total, you should be able to remove it yourself.