Differential Diagnosis for Redness along Corona of Penis
Single Most Likely Diagnosis
- Balanitis: This is an inflammation of the glans penis, which can cause redness, swelling, and pain. It is a common condition, especially in uncircumcised men, and can be caused by poor hygiene, infections (bacterial, fungal, or viral), or allergic reactions.
Other Likely Diagnoses
- Contact Dermatitis: An allergic reaction or irritation from soaps, condoms, or other products can cause redness and inflammation on the penis, including the corona.
- Phimosis: Inflammation or infection of the foreskin can lead to redness and swelling, which may extend to the corona in uncircumcised men.
- Urethritis: Inflammation of the urethra, often due to sexually transmitted infections (STIs), can cause symptoms including redness at the opening of the penis, which might be noticed along the corona.
Do Not Miss Diagnoses
- Sexually Transmitted Infections (STIs): Conditions like gonorrhea, chlamydia, syphilis, and herpes can present with genital lesions or redness. Missing these diagnoses can lead to serious health consequences, including infertility and increased risk of HIV transmission.
- Penile Cancer: Although rare, any unusual or persistent lesion or redness on the penis should prompt consideration of penile cancer, as early detection is crucial for effective treatment.
Rare Diagnoses
- Lichen Sclerosus: A chronic inflammatory skin condition that can affect the genital area, leading to thinning and whitening of the skin, which might initially present with redness.
- Psoriasis: A chronic autoimmune condition that can cause red, scaly patches on various parts of the body, including the penis.
- Fixed Drug Eruption: A condition where certain medications cause skin lesions or redness in the same spot each time the drug is taken, which could potentially occur on the penis.