A bump with clear liquid coming out of it is a blister.
The blisters can develop on areas of your body where rubbing or friction occurs like the feet and hands.
Fluid filled blisters contain plasma, pus or serum.
Blisters are small pockets of fluid that usually form in the upper layers of skin after it's been damaged.
Blisters can develop anywhere on the body but are most common on the hands and feet.
Fluid collects under the damaged skin, cushioning the tissue underneath.
Use a needle to prick the blister in several spots near the edge.
Let the fluid drain, but leave the overlying skin in place.
Apply an ointment such as petroleum jelly to the blister and cover it with a nonstick gauze bandage.
If a rash appears, stop using the ointment.
The clear, watery liquid inside a blister is called serum.
It leaks in from neighboring tissues as a reaction to injured skin.
If the blister remains unopened, serum can provide natural protection for the skin beneath it.
In most cases, blisters do not need treatment and will heal on their own within 1–2 weeks.
Blisters hurt because the epidermis, the top layer of the skin, generally dulls sensation but has been pulled loose from the underlying layers.
These layers, called the dermis, hold more nerves and can therefore register more sensations of pressure and pain.
Although not necessary, you can use an antibiotic ointment such as Neosporin (triple antibiotic ointment, polysporin (double antibiotic ointment, or Vaseline (petroleum jelly).
Early stage blisters – redness of the skin on the affected area, such as on the heel, the instep, toes, or palms.
Mild, middle stage blisters – the affected area forms into a bubble-like swelling under the skin.
The fluid is clear.