I am very prone to infection, rashes and skin allergies. what can be the cause. my wbc count is 6500.

Can you explain?: What kinds of infections, Champ? If you're getting rashes, you need to get the cause diagnosed. Everybody gets minor infections fairly often. Signs of immunodeficiency would be a few episodes of pneumonia, meningitis or vicious soft tissue infection landing you in the hospital. If you're getting skin allergy / contact dermatitis, a cause needs to be identified. Dermatology consult is in order.