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Dr. German
Dr. German, Doctor (MD)
Category: Health
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Experience:  MD
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A little over a week ago I noticed a small lump under the skin

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A little over a week ago I noticed a small lump under the skin on the inside of my thumb by the knuckle. After I rubbed it the lump did get smaller. The lump is so small if I rub my thumb against my skin I can't feel it. If I bend my thumb I can't feel it either.
Welcome and thanks for your question , most of these tiny lumps are ganglion cysts ( which is a small fluid filled sac or pouch under the skin ) .

Other possibility would be an inclusion cyst ,they also contain fluid and are result of a previous trauma in your hands or finger .

These cysts do not produce any problems .

However ,they could grow overtime in which case they will need to be removed.

Other conditions that produce similar symptoms are bone spurs ( these are bone spiky projections , specially in areas where there have been bone loss ), tendon inflammation, tendon sheath tiny mass or an enchondroma ( which is small mass of cartilage tissue that grows inside the bones ) .

But this is probably a cyst and nothing else .

If you continue feeling it , You should consult a doctor who will evaluate you and perform a hand X-rays .

For most patients , these tiny ganglion cysts do not need to be removed ,only they grow producing discomfort or pain.

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