"We cannot adequately take care of silicone injections gone wrong," he added.
In March 2012, Padge Victoria Windslowe, aka the "Black Madam," allegedly administered illegal "butt-boosting" injections that might have caused the death of a 20-year-old British woman last year, ABC News previously reported.
In a separate incident, Windslowe of Philadelphia was arrested after a 23-year-old woman who allegedly attended Windslowe's "pumping party" was admitted to a Philadelphia-area hospital after the substance Windslowe allegedly injected into her buttocks got into her bloodstream and into her lungs.
"These methods are clearly rising in popularity because we're seeing more people with problems related to this," Dr. Roth said.
In November, Oneal Ron Morris was arrested in Florida for allegedly administering a series of "butt-boosting" injections made from a concoction of cement, glue and tire sealant.
In January 2011, Whalesca Castillo, an unlicensed practitioner in New York City, was arrested for allegedly running an illegal business out of her home injecting women with liquid silicone in the buttocks and breasts.
And in 2010, a Miami woman, Ana Josefa Sevilla, was charged with a similar crime after one of her clients allegedly ended up in the emergency room with complications.
Plastic surgeons and dermatologists continue to warn consumers about the dangers of getting cosmetic procedures in non-approved facilities and from non-certified practitioners. The notion of cutting costs for a typically expensive procedure might be tempting, but the results can be dangerous.
"If you want substantial improvement, don't try a short cut," Roth said. "It'll end up being a long-term problem."
Dr. Abdelmalek said that undergoing procedures by practitioners who are not medically trained not only increases the risk of receiving a wrong injection, but there's also an added risk that the practitioner might be using incorrect monitoring of the anesthetics used or using improper aseptic techniques.
"You might go places and get away with it but you're rolling the dice," he said. "It is never OK to go to an unlicensed person for a medical procedure. It takes training and medical expertise that you don't get in an underground environment."
Wonder said, "I wasn't smart enough to think about these things."
Wonder said that many women who now undergo these underground procedures know their risk, but they don't think anything will go wrong with them.
"Everybody who goes to that knows that what they're doing is wrong, yet they still do it," she said.
Wonder also said, based on her observations, many women who take the back-road option are in their 30s and 40s and have the money to spend on legitimate procedures, contrary to the common belief that the kind of women undergoing the procedures are in their 20s and don't have the money.
"If women want to get a bigger butt, I'm all for it," Wonder said. "I'm not against cosmetic surgery but just do it the safe way."
The best way to ensure getting a safe procedure is to meet the practitioner before agreeing to go through with the procedure, Abdelmalek said. Also, always ask for the practitioner's licenses and qualifications, and have them fully communicated any risks that might be involved.
"Even in the best of hands, there are risks of complication," he added. "You should feel comfortable that the person can handle your complications."
ABC News' Carrie Gann and Dan Childs contributed to this report.