Dr. John A Lenahan M.D.
Dermatologist595 Buckingham Way Suite #404 San Francisco CA, 94132
Dr. John Lenahan is a dermatologist practicing in San Francisco, CA. Dr. Lenahan specializes in skin care. Dermatologists evaluate and manage both common and uncommon skin conditions. These conditions include acne, psoriasis, warts, skin infections, atopic dermatitis, herpes simplex and more. Dermatologists are also experts in more complex skin diseases like impetigo, hidradenitis and milaria. Dr. Lenahan diagnoses skin problems and develops unique treatments plans for each individual patient.
Education and Training
Creighton University School of Medicine 1967
DermatologyAmerican Board of DermatologyABD- Dermatopathology
- Moffitt Hosp Univ Of Ca, Dermatology; Creighton Univ Affil Hosp, Flexible Or Transitional Year
- Calif Med Center 1968
- Cooper Hospital-University Medical Center Program
Dr. John A Lenahan M.D.'s Practice location
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Patient Experience with Dr. Lenahan
- What Are Freckles?
What are freckles?Freckles are flat and circular spots that are beige or brown in color. Their size is usually comparable to the size of the head of a small nail. People who have red hair and a fair complexion often have freckles because of the MC1R variant gene, which is responsible for the...
- Heat Rash: What Is Miliaria Profunda?
Heat rash is a generic term used to describe a skin infection that is caused by an intense heat exposure to the skin. As a result of the body being exposed to too much heat, there is excess sweating.This excess sweat mostly blocks the sweat glands, which leads to the trapping of perspiration in the...
- The Effects of Sun Damage
New research has reported that exposure to pollution may double the skin damage caused by the Sun. The study reports that extreme weather and smoking may also increase the damage caused by ultraviolet radiations. The results of the study were presented at the annual meeting of the American Academy...
- What Are Comedones?
What are Comedones?Comedones refer to skin bumps, which are a result of clogged pores. A single bump or lesion is called a comedo. Skin pores can be fully or partially blocked and often lead to the formation of whiteheads and blackheads. Mild acne involves the presence of whiteheads and blackheads,...
- Is Scabies a Sexually Transmitted Disease (STD)?
Sexually transmitted diseases (STDs)These are infections that can be passed from one person to another through anal sex, oral sex, and vaginal sex. Many people might have an STD, but they may not show symptoms. STDs are common in people. They can be dangerous, but most of them can be...
- What Causes Acne?
Acne is an illness that affects the oil glands present on the skin. It develops when the hair follicles get blocked. Sebaceous glands refer to the tiny glands located near the skin’s surface. They’re attached to the hair follicles, which are tiny pores on your skin whereby your hairs grow out...
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