There's lot of dandruff on my head..does iit lead to pimples? how to get rid of dandruff and pimples ?

No, unless..: You may be feeling little sports of psoriasis on your scalp. Use a shampoo with zinc pyrithione, tar, and/or selenium. Shapoos with salicyclic acid break down scakes, which helps. But does not prevent dandruff!

Scalp Acne: Scalp acne is less common than acne on the face or back, but it develops in the same way. Skin naturally produces a protective layer of oil known as sebum. Sebum makes its way to the skin's surface through pores, and excess oil, dead skin cells or other substances can clog them. Bacteria multiply in the trapped sebum, forming a pre-pimple, or a microcomedone. Antibiotics are treatment of choice.