Breast has red pumps after buying used breast pump?

Need to get checked. You know, lots of things can happen as you first start nursing. If the pump was clean, probably not related to the rash; but really since a baby is involved and could be affected, you need to have your breasts checked for irritation, inflammation, and infection.
Used breast pump. If the "red lumps" are tender, swollen, warm and skin appears infected-have you ob-gyn/fp/internist evaluate the area (s). If you are concerned about the pump-purchase new tubing and have a lactaton specialist evaluate your use of the device to see if any tips/advice can be made.

Related Questions

Is it better to rent or to buy a breast pump?

It depends. Some mothers find renting a hospital-grade pump to be very efficient for breast pumping (you will need to purchase the sterile nursing equipment separately). However, if you desire to pump at work, it may be convenient to purchase a portable pump that is easier to transport discretely from home to work. Furthermore, some mothers find manual pumping to be reasonably efficient and less expensive.
Yes and no. If you can afford to buy and you plan on using it often and/or for multiple newborn/infants go for it. Renting is also just as good but the equipment is not yours to keep. You can always pass it on to a friend if you buy (or buy from someone you know).

How do I clean my breast pump?

Wash it well. Wash each individual piece well with soap and water with dedicated cleaning utensils. You can also use those handy microwave sterilizing bags to finish the job.
Rinse/dishwasher. The pump itself isn't meant to be "cleaned"-- only the parts that touch you and touch the milk need to be washed. Check the manufacturer's instructions, but for most of them the reservoir bottles and the funnel-shaped part that goes against your breast (sometimes called the "shield") can be washed by hand or in the dishwasher. The tubing can be rinsed out by hand.

Why would a woman use a breast pump?

Express milk. Pumps are used to express breast milk. So it can be given via a bottle or stored for later use.

What should I look for in a breast pump?

How busy are you? If you are really on the move daily, having a manual pump is a good option. Otherwise, the electric pumps are much easier and better.
Lots to consider. Cost, speed with which you can pump, can you pump both breasts simultaneously, availability of replacement parts, weight to carry around and travel....All these are important considerations.

Is there any way to try out a breast pump?

Yes. Sure! You can rent one from most hospitals that deliver babies. Just call the lactation consultant at your nearby hospital and they will usually be able to get you a hospital-grade pump. You will need to purchase your own sterile equipment that will be used only for your baby. They are usually able to provide this for you to purchase as well.

Would a breast pump help make breasts bigger?

NO. If you feel like you want larger breasts, see a plastic surgeon.
No. The breasts enlarge naturally with weight gain, puberty, pregnancy and breast-feeding. Some oral contraceptives can be associated with increase in breast size in some women (sometimes). Building up pectoral muscles can lead to the breasts sitting on the chest wall in a manner that is attractive but will not increase cup size.