- Milia
- Melanoma
- Median rhomboid glossitis
- Marbled skin
- Malassezia folliculitis
- Lichen sclerosus
- Lichen planus
- Intertrigo
- Infectious eczematoid dermatitis
- Infantile papular acrodermatitis
- Infant perianal pyramidal protrusion
- Impetigo
- Ichthyosis
- Hyperglobulinemic purpura
- Herpetic keratoconjunctivitis
- Heat rash