Pros
Skin disease (topical).
Anti-fungal
Eczema, Diaper Rash, and Other Skin Conditions 
Bacterial Vaginosis and Vaginal Yeast Infections
Calendula as Sunscreen 
Radiation Dermatitis
Wounds and Pressure Ulcers
calendula was believed to imbue magical powers of protection and clairvoyance, and even to assist in legal matters.
Treating hemorrhoids
Healing ear infections
 
Cons
 
Do not use if you are allergic to ragweeds.