Excess white blood cells can be due to some infection coming in. Though there could be other reasons. WBCs are scavengers in our body to fight infection.
You can give him a combination of HEART SERUM + IMMUNE SERUM + BALANCE SERUM
Fore sore legs, use PAIN CARE SERUM+ PERFECT HEALTH SERUM + GYM SERUM.
PAIN CARE SERUM is for all types of pain including back ache.
You can continue with MEN SERUM as its for all males.