Suggest Remedy For Lumps In Back

I am 16 years old, I weigh 11 stone 10 pounds and am 5 foot 3 inches tall. For about a year I have had a small, hard, colourless lump on the top right side of my back. It has recently started hurting when I touch it. I have also recently developed very small red spots on my back and shoulder which are painless. The lump has never got bigger and it has become slightly smaller and sometimes I get an aching in my spine. I haven t suffered any other problems except the pain when the lump is touched. I suffered from mild asthma when i was younger but it hasn t effected me since i was about 13.