Cysts After Hair Transplant
Cysts after hair transplant are small benign lumps that form when hair follicles or keratin become trapped beneath the skin during healing. They usually appear weeks or months after surgery and are often harmless, resolving on their own or with simple treatment.
A cyst forms when skin closes over something that should have reached the surface. A graft buried below the surface, or a second graft placed on top of one already there, ends up sealed under healed skin. The follicle keeps producing keratin with nowhere to send it, and that accumulation becomes a firm lump. It is a mechanical consequence of placement, not an infection.
It is uncommon, and it is not what most bumps are. In the complications literature cysts are recorded as an infrequent finding, well behind pustules and folliculitis (Romera de Blas et al., Frontiers in Medicine, 2026). Most lumps in the first weeks are something else entirely.
| Cyst | Pustule or folliculitis | |
|---|---|---|
| Feel | Firm, deeper, smooth | Superficial, tender, often with a head |
| Timing | Weeks to months after surgery | Mostly the first four weeks |
| Course | Persists; does not settle on its own | Usually resolves as the area matures |
Squeezing is the wrong instinct. A cyst has no opening to the surface, so pressure drives its contents sideways into surrounding tissue and can inflame an area that was quiet. Persistent lumps are assessed rather than treated at home.
The prevention is placement discipline. Depth matched to the graft, and no site filled twice, removes the mechanism entirely.
Related terms
For working out what a bump actually is, see pimples after a hair transplant. For pustules around the follicles themselves, see folliculitis after a hair transplant.
