Some types of pathogens — notably bacteria and fungi — are typically present on the skin, but if they become too numerous, the immune system can no longer manage them.In this case, an infection can result.The cause of a skin infection depends on the pathogen involved.

In this dataset image collected from internet.
this dataset there are total 8 class ,They are

1. Bacterial Infections- cellulitis
2. Bacterial Infections- impetigo
3. Fungal Infections - athlete -foot
4. Fungal Infections - nail-fungus
5. Fungal Infections - ringworm
6. Parasitic Infections - cutaneous-larva-migrans
7. Viral skin infections - chickenpox
8. Viral skin infections - shingles

Here ,
Bacterial Infections.
Bacterial skin infections occur when bacteria enter the skin, either from an outside source or because they are present on the skin. They can enter the skin through a hair follicle or after a wound.
Anthrax is one type of bacterium that can enter from the environment. Staphylococcus and Streptococcus are bacteria that are commonly present on the skin and only cause a problem in certain circumstances. Lyme disease is a tick-borne infection that causes skin symptoms.
Bacterial infections can be systemic or local. Systemic infections can cause symptoms throughout the whole body, such as a fever, while local infections only affect a specific area. Some bacterial infections can begin in one area and spread throughout the body.
Some bacterial skin infections, such as impetigo, can spread between people through direct skin contact or with bodily fluids, contaminated food or water, or by touching surfaces where bacteria are present. Others, such as cellulitis, are not contagious.
Different types of bacterial skin infections include:

• cellulitis
• impetigo
• Hansen’s disease (leprosy)
• syphilis

Some bacterial infections are mild and easy to treat with topical antibiotics .

Fungal Infections: These types of skin infections are caused by a fungus and are most likely to develop in moist areas of the body where surfaces meet, such as the feet, armpit, or where there are skin folds.
In some cases, an allergy to the fungus causes symptoms in other areas that are not directly affected. For instance, a person with a fungal infection on the foot might develop a rash on their fingers. It doesn’t happen because the person touched their foot.
Different types of fungal infections:

• athlete’s foot
• ringworm
• nail fungus

Parasitic Infections: These types of skin infections are caused by a parasite. These infections can spread beyond the skin to the bloodstream and organs. A parasitic infection isn’t life-threatening but can be uncomfortable.
Different types of parasitic skin infections include:

• scabies
• cutaneous larva migrans

Viral skin infections
Viruses can cause different types of infections that have skin symptoms, such as:
• shingles (herpes zoster)
• chickenpox

These viruses are often contagious, and most are systemic.