Medical camps were erected at Kameme Beach, Kendo, Karagita Beach, Bufallo Mall, Soy Sambu, Elementaita and Sleeping Warriors.
Among services provided in the medical camps include screening of HIV, Hepatitis and Sexually transmitted diseases like syphilis.
Self-HIV testing kits are also being distributed.
By Sunday morning, more than 10,000 people picked oral HIV testing kits, with at least 15,000 having received other services.
A spot check at the rally camps revealed high consumption of alcohol among young people. Alcohol was sold even after the government banned its sale.
Adolescents in skimpy dresses were also spotted, some indulging in alcohol abuse, and smoking.
NSDCC together with other partners and the County Government of Nakuru is currently conducting a campaign on alcohol consumption and drug abuse.
Nakuru County Chief Officer of Health Joyce Ncece added that Nakuru has increased cases of sexually transmitted infections and HIV, associated with rallies that have been happening.
"Most speculators attending the rally bring with them young people. We have seen so many people coming for condoms, and for services," said Ncece.
Ncece added, "We are going back to where we were, cases had gone doown but seems that the gains we had we are losing them. Most of those affected are the youth,"