Ismo may refer to:

-ism in Spanish, Portuguese, Esperanto and Italian
Ismo, a brand name for isosorbide mononitrate
Ismo Leikola, Finnish comedian
Tropical acne is unusually severe acne occurring in the tropics during seasons when the weather is hot and humid. : 500 Skin conditions including acne are seen with more frequency in dermatological consultations in hot and humid climates, where bacterial and fungal infections are more common than in drier climates. See also
List of cutaneous conditions

References
External links
Understanding Acne Blemishes with a Skin Specialist