I have these bumps on my face from shaving years back. they are hard but painless. how can i get rid of them?

Pseudofolliculitis: Sounds like pseudofolliculitis barbae which is caused by ingrown hairs from shaving. This condition can be helped with laser hair removal.

Facial lesions: The answer depends a lot on the nature and cause of the "bumps". Without examining you it's difficult to recommend the best solution, but multiple treatment possibilities exist, including: steroid injections to soften/flatten the bumps, surgical excision of the masses, or possibly even resurfacing procedures with derm abrasion or an ablative laser.

Steroid injections: Razor bumps are produced by ingrown hairs that produce a foreign body inflammatory reaction followed by severe scarring. Steroid injections can sometimes reduce hypertrophic scarring. If the scarring is extensive, you may require surgical excision.